Dépouillements

Puddle dynamics and air-to-fuel ratio compensation for gasoline-ethanol blends in flex-fuel engines / Kyung-ho Ahn in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1241-1253 Titre : Puddle dynamics and air-to-fuel ratio compensation for gasoline-ethanol blends in flex-fuel engines Type de document : texte imprimé Auteurs : Kyung-ho Ahn, Auteur ; Stefanopoulou, Anna G., Auteur ; Mrdjan Jankovic, Auteur Année de publication : 2011 Article en page(s) : pp. 1241-1253 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Air-to-fuel  ratio  (AFR)  control  Evaporation  Flex-fluel  vehicles  (FFVs)  Fuel  dynamics  Gasoline-ethanol  blend  Multi-component  fuel Index. décimale : 629.1 Résumé : Ethanol is being increasingly used as an alternative fuel to petroleum-based gasoline and diesel derivatives. Currently available flexible fuel vehicles (FFVs) can operate on a blend of gasoline and ethanol in any concentration of up to 85% ethanol (93% in Brazil) with minimum hardware modifications. This flexibility is partly achieved through the closed-loop air-to-fuel ratio control which maintains automatically operation around the stoichiometric ratio. Precise transient air-to-fuel ratio (AFR) control depends however on a feedforward compensator that reduces the transient effects of fuel puddle dynamics. An accurate and tunable model of the fuel puddle dynamics for gasoline-ethanol blends is, thus, necessary for the purpose of AFR control. In this paper, we propose a physics-based fuel puddle model that may be used for control purposes in flex-fuel vehicles. In particular, the gasoline-ethanol blend is modeled using several chemical compounds and is parameterized by ethanol content. The model consists of a droplet evaporation model and a single-puddle vaporization model. The droplet evaporation model is simulated offline to generate port wall-impacting factors of injected fuel to be used in a single-puddle vaporization model. The single-puddle vaporization model is a cycle-based model that may be simulated online to characterize fuel puddle dynamics in port fuel injected engines. To verify the validity of the model, simulation results are compared with limited experimental data. A transient fuel compensator based on the proposed model is also formulated. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5356229 [article] Puddle dynamics and air-to-fuel ratio compensation for gasoline-ethanol blends in flex-fuel engines [texte imprimé] / Kyung-ho Ahn, Auteur ; Stefanopoulou, Anna G., Auteur ; Mrdjan Jankovic, Auteur . - 2011 . - pp. 1241-1253. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1241-1253 Mots-clés : Air-to-fuel  ratio  (AFR)  control  Evaporation  Flex-fluel  vehicles  (FFVs)  Fuel  dynamics  Gasoline-ethanol  blend  Multi-component  fuel Index. décimale : 629.1 Résumé : Ethanol is being increasingly used as an alternative fuel to petroleum-based gasoline and diesel derivatives. Currently available flexible fuel vehicles (FFVs) can operate on a blend of gasoline and ethanol in any concentration of up to 85% ethanol (93% in Brazil) with minimum hardware modifications. This flexibility is partly achieved through the closed-loop air-to-fuel ratio control which maintains automatically operation around the stoichiometric ratio. Precise transient air-to-fuel ratio (AFR) control depends however on a feedforward compensator that reduces the transient effects of fuel puddle dynamics. An accurate and tunable model of the fuel puddle dynamics for gasoline-ethanol blends is, thus, necessary for the purpose of AFR control. In this paper, we propose a physics-based fuel puddle model that may be used for control purposes in flex-fuel vehicles. In particular, the gasoline-ethanol blend is modeled using several chemical compounds and is parameterized by ethanol content. The model consists of a droplet evaporation model and a single-puddle vaporization model. The droplet evaporation model is simulated offline to generate port wall-impacting factors of injected fuel to be used in a single-puddle vaporization model. The single-puddle vaporization model is a cycle-based model that may be simulated online to characterize fuel puddle dynamics in port fuel injected engines. To verify the validity of the model, simulation results are compared with limited experimental data. A transient fuel compensator based on the proposed model is also formulated. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5356229

A Fault diagnosis and security framework for water systems / Demetrios G. Eliades in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1254-1265 Titre : A Fault diagnosis and security framework for water systems Type de document : texte imprimé Auteurs : Demetrios G. Eliades, Auteur ; Marios M. Polycarpou, Auteur Année de publication : 2011 Article en page(s) : pp. 1254-1265 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Fault  diagnosis  framework  Security  Sensor  placement  Water  distribution  networks  Water  systems Index. décimale : 629.1 Résumé : Water resources management is a key challenge that will become even more crucial in the years ahead. From a system-theoretic viewpoint, there is a need to develop rigorous design and analysis tools for control, fault diagnosis and security of water distribution networks. This work develops a mathematical framework suitable for fault diagnosis and security in water systems; in addition it investigates the problem of determining a suitable set of locations for sensor placement in large-scale drinking water distribution networks such that contaminant detection is optimized. This work contributes to the research by presenting a problem formulation were the state-space representation of the propagation and reaction dynamics is coupled with the impact dynamics describing the “damage” caused by a contamination of the water distribution network. We propose a solution methodology for the sensor-placement problem by considering several risk-objectives, and by utilizing various optimization and evolutionary computation techniques. To illustrate the methodology, we present results of a simplified and a real water distribution network. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5350461 [article] A Fault diagnosis and security framework for water systems [texte imprimé] / Demetrios G. Eliades, Auteur ; Marios M. Polycarpou, Auteur . - 2011 . - pp. 1254-1265. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1254-1265 Mots-clés : Fault  diagnosis  framework  Security  Sensor  placement  Water  distribution  networks  Water  systems Index. décimale : 629.1 Résumé : Water resources management is a key challenge that will become even more crucial in the years ahead. From a system-theoretic viewpoint, there is a need to develop rigorous design and analysis tools for control, fault diagnosis and security of water distribution networks. This work develops a mathematical framework suitable for fault diagnosis and security in water systems; in addition it investigates the problem of determining a suitable set of locations for sensor placement in large-scale drinking water distribution networks such that contaminant detection is optimized. This work contributes to the research by presenting a problem formulation were the state-space representation of the propagation and reaction dynamics is coupled with the impact dynamics describing the “damage” caused by a contamination of the water distribution network. We propose a solution methodology for the sensor-placement problem by considering several risk-objectives, and by utilizing various optimization and evolutionary computation techniques. To illustrate the methodology, we present results of a simplified and a real water distribution network. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5350461

Development and experimental evaluation of a tilt stability control system for narrow commuter vehicles / Samuel Kidane in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1266-1279 Titre : Development and experimental evaluation of a tilt stability control system for narrow commuter vehicles Type de document : texte imprimé Auteurs : Samuel Kidane, Auteur ; Rajamani, Rajesh, Auteur ; Lee Alexander, Auteur Année de publication : 2011 Article en page(s) : pp. 1266-1279 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Narrow  vehicle  Roll  control  Roll  dynamics  Rollover  prevention  Tilt  control Index. décimale : 629.1 Résumé : This paper concentrates on development and experimental investigation of a compound control system designed for tilt stability of a narrow commuter vehicle. The control system is a combination of three different types of control schemes: Steering Tilt Control (STC) system, Direct Tilt Control (DTC) system and Tilt Brake system. These schemes utilize different types of actuators and offer complementary advantages over different ranges of operating speeds. The design of the control system is discussed. Then the combined STC-DTC system is first validated by running standard vehicle maneuver experiments such as turns and lane changes. The performance of the Tilt Brake algorithm is then verified for different low speed maneuvers. The feasibility of a stand alone DTC system is also experimentally investigated. Finally different experimental results are presented to demonstrate the effect of desired tilt angle definition on the handling of a narrow tilting vehicle. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5356230 [article] Development and experimental evaluation of a tilt stability control system for narrow commuter vehicles [texte imprimé] / Samuel Kidane, Auteur ; Rajamani, Rajesh, Auteur ; Lee Alexander, Auteur . - 2011 . - pp. 1266-1279. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1266-1279 Mots-clés : Narrow  vehicle  Roll  control  Roll  dynamics  Rollover  prevention  Tilt  control Index. décimale : 629.1 Résumé : This paper concentrates on development and experimental investigation of a compound control system designed for tilt stability of a narrow commuter vehicle. The control system is a combination of three different types of control schemes: Steering Tilt Control (STC) system, Direct Tilt Control (DTC) system and Tilt Brake system. These schemes utilize different types of actuators and offer complementary advantages over different ranges of operating speeds. The design of the control system is discussed. Then the combined STC-DTC system is first validated by running standard vehicle maneuver experiments such as turns and lane changes. The performance of the Tilt Brake algorithm is then verified for different low speed maneuvers. The feasibility of a stand alone DTC system is also experimentally investigated. Finally different experimental results are presented to demonstrate the effect of desired tilt angle definition on the handling of a narrow tilting vehicle. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5356230

Global asymptotic saturated PID control for robot manipulators / Yuxin Su in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1280-1288 Titre : Global asymptotic saturated PID control for robot manipulators Type de document : texte imprimé Auteurs : Yuxin Su, Auteur ; C. Müller, Auteur ; Chunhong Zheng, Auteur Année de publication : 2011 Article en page(s) : pp. 1280-1288 Note générale : Génie Aéroqpatial Langues : Anglais (eng) Mots-clés : Actuator  saturation  Asymptotic  stability  Bounded  control  Global  stability  Proportional-integral  derivative  (PID]  control  Robot  control Index. décimale : 629.1 Résumé : This paper addresses the global asymptotic regulation of robot manipulators under input constraints, both with and without velocity measurements. It is proven that robot systems subject to bounded inputs can be globally asymptotically stabilized via a saturated proportional-integral-derivative (PID) control in agreement with Lyapunov's direct method and LaSalle's invariance principle. Advantages of the proposed controller include an absence of modeling parameters in the control law formulation and an ability to ensure actuator constraints are not breached. This is accomplished by selecting control gains a priori, removing the possibility of actuator failure due to excessive torque input levels. The effectiveness of the proposed approach is illustrated via simulations. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5353633 [article] Global asymptotic saturated PID control for robot manipulators [texte imprimé] / Yuxin Su, Auteur ; C. Müller, Auteur ; Chunhong Zheng, Auteur . - 2011 . - pp. 1280-1288. Génie Aéroqpatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1280-1288 Mots-clés : Actuator  saturation  Asymptotic  stability  Bounded  control  Global  stability  Proportional-integral  derivative  (PID]  control  Robot  control Index. décimale : 629.1 Résumé : This paper addresses the global asymptotic regulation of robot manipulators under input constraints, both with and without velocity measurements. It is proven that robot systems subject to bounded inputs can be globally asymptotically stabilized via a saturated proportional-integral-derivative (PID) control in agreement with Lyapunov's direct method and LaSalle's invariance principle. Advantages of the proposed controller include an absence of modeling parameters in the control law formulation and an ability to ensure actuator constraints are not breached. This is accomplished by selecting control gains a priori, removing the possibility of actuator failure due to excessive torque input levels. The effectiveness of the proposed approach is illustrated via simulations. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5353633

Model-based control of HCCI engines using exhaust recompression / Nikhil Ravi in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1289-1302 Titre : Model-based control of HCCI engines using exhaust recompression Type de document : texte imprimé Auteurs : Nikhil Ravi, Auteur ; Roelle, Matthew, J., Auteur ; Hsien-Hsin Liao, Auteur Année de publication : 2011 Article en page(s) : pp. 1289-1302 Note générale : Energie Aéronospatial Langues : Anglais (eng) Mots-clés : Cycle-by-cycle  control  Cyclic  variability  Homogeneous  charge  compression  ignition  (HCCI)  Physical  modeling  Linear  control Index. décimale : 629.1 Résumé : Homogeneous charge compression ignition (HCCI) is one of the most promising piston-engine concepts for the future, providing significantly improved efficiency and emissions characteristics relative to current technologies. This paper presents a framework for controlling an HCCI engine with exhaust recompression and direct injection of fuel into the cylinder. A physical model is used to describe the HCCI process, with the model states being closely linked to the thermodynamic state of the cylinder constituents. Separability between the effects of the control inputs on the desired outputs provides an opportunity to develop a simple linear control scheme, where the fuel is used to control the work output and the valve timings are used to control the phasing of combustion. The controller is tested on both a single and multi-cylinder HCCI engine, demonstrating the value of a physical model-based control approach that allows an easy porting of the control structure from one engine to another. Experimental results show good tracking of both the work output and combustion phasing over a wide operating region on both engines. In addition, the controller is able to balance out differences between cylinders on the multi-cylinder engine testbed, and reduce the cycle-to-cycle variability of combustion. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5356220 [article] Model-based control of HCCI engines using exhaust recompression [texte imprimé] / Nikhil Ravi, Auteur ; Roelle, Matthew, J., Auteur ; Hsien-Hsin Liao, Auteur . - 2011 . - pp. 1289-1302. Energie Aéronospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1289-1302 Mots-clés : Cycle-by-cycle  control  Cyclic  variability  Homogeneous  charge  compression  ignition  (HCCI)  Physical  modeling  Linear  control Index. décimale : 629.1 Résumé : Homogeneous charge compression ignition (HCCI) is one of the most promising piston-engine concepts for the future, providing significantly improved efficiency and emissions characteristics relative to current technologies. This paper presents a framework for controlling an HCCI engine with exhaust recompression and direct injection of fuel into the cylinder. A physical model is used to describe the HCCI process, with the model states being closely linked to the thermodynamic state of the cylinder constituents. Separability between the effects of the control inputs on the desired outputs provides an opportunity to develop a simple linear control scheme, where the fuel is used to control the work output and the valve timings are used to control the phasing of combustion. The controller is tested on both a single and multi-cylinder HCCI engine, demonstrating the value of a physical model-based control approach that allows an easy porting of the control structure from one engine to another. Experimental results show good tracking of both the work output and combustion phasing over a wide operating region on both engines. In addition, the controller is able to balance out differences between cylinders on the multi-cylinder engine testbed, and reduce the cycle-to-cycle variability of combustion. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5356220

An Improved particle swarm optimization algorithm for the hybrid flowshop scheduling to minimize total weighted completion time in process industry / Lixin Tang in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1303-1314 Titre : An Improved particle swarm optimization algorithm for the hybrid flowshop scheduling to minimize total weighted completion time in process industry Type de document : texte imprimé Auteurs : Lixin Tang, Auteur ; Xianpeng Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 1303-1314 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Hybrid  flowshop  scheduling  (HFS)  Hybrid  simulated  annealing  Hybrid  variable  neighborhood  search  Improved  particle  swarm  optimization  Three  level  population  update  method Index. décimale : 629.1 Résumé : In this paper, we present an improved particle swarm optimization (PSO) algorithm for the hybrid flowshop scheduling (HFS) problem to minimize total weighted completion time. This problem has a strong practical background in process industry. For example, the integrated production process of steelmaking, continuous-casting, and hot rolling in the iron and steel industry, and the short-term scheduling problem of multistage multiproduct batch plants in the chemical industry can be reduced to a HFS problem. To make PSO applicable in the HFS problem, we use a job permutation that is the processing order of jobs in the first stage to represent a solution, and construct a greedy method to transform this job permutation into a complete HFS schedule. In addition, a hybrid variable neighborhood search (VNS) incorporating variable depth search, a hybrid simulated annealing incorporating stochastic local search, and a three-level population update method are incorporated to improve the search intensification and diversification of the proposed PSO algorithm. Computational experiments on practical production data and randomly generated instances show that the proposed PSO algorithm can obtain good solutions compared to the lower bounds and other metaheuristics. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5357401 [article] An Improved particle swarm optimization algorithm for the hybrid flowshop scheduling to minimize total weighted completion time in process industry [texte imprimé] / Lixin Tang, Auteur ; Xianpeng Wang, Auteur . - 2011 . - pp. 1303-1314. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1303-1314 Mots-clés : Hybrid  flowshop  scheduling  (HFS)  Hybrid  simulated  annealing  Hybrid  variable  neighborhood  search  Improved  particle  swarm  optimization  Three  level  population  update  method Index. décimale : 629.1 Résumé : In this paper, we present an improved particle swarm optimization (PSO) algorithm for the hybrid flowshop scheduling (HFS) problem to minimize total weighted completion time. This problem has a strong practical background in process industry. For example, the integrated production process of steelmaking, continuous-casting, and hot rolling in the iron and steel industry, and the short-term scheduling problem of multistage multiproduct batch plants in the chemical industry can be reduced to a HFS problem. To make PSO applicable in the HFS problem, we use a job permutation that is the processing order of jobs in the first stage to represent a solution, and construct a greedy method to transform this job permutation into a complete HFS schedule. In addition, a hybrid variable neighborhood search (VNS) incorporating variable depth search, a hybrid simulated annealing incorporating stochastic local search, and a three-level population update method are incorporated to improve the search intensification and diversification of the proposed PSO algorithm. Computational experiments on practical production data and randomly generated instances show that the proposed PSO algorithm can obtain good solutions compared to the lower bounds and other metaheuristics. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5357401

A Study on the effects of kalman filter on performance of IPMC-based active vibration control scheme / Dibakar Bandopadhya in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1315-1324 Titre : A Study on the effects of kalman filter on performance of IPMC-based active vibration control scheme Type de document : texte imprimé Auteurs : Dibakar Bandopadhya, Auteur ; James Njuguna, Auteur Année de publication : 2011 Article en page(s) : pp. 1315-1324 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Active  vibration  control  Electro-active  polymer  (EAP)  Heaviside  function  Ionic  polymer  metal  composite  (IPMC) Index. décimale : 629.1 Résumé : This paper evaluates the effectiveness and performance of ionic polymer metal composite (IPMC)-based active vibration control scheme equipped with the Kalman estimation algorithm. To assess the vibration attenuation efficiency, a rotating flexible manipulator has been modelled integrating two IPMC actuators following the modal approach. The elastic displacements as generalized coordinates for estimating optimal performance is carried out next by discretizing the elastic motion through the assumed mode technique and applying the Kalman filter. Simulations are then performed to demonstrate effective vibration attenuation using both IPMC and the Kalman filter. Kalman filter is employed for the whole vibrating system taking into account of the bending moment generated by the IPMC actuator. Experiment is conducted for the proposed damping scheme and the results are compared and verified with the simulation results. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5393036 [article] A Study on the effects of kalman filter on performance of IPMC-based active vibration control scheme [texte imprimé] / Dibakar Bandopadhya, Auteur ; James Njuguna, Auteur . - 2011 . - pp. 1315-1324. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1315-1324 Mots-clés : Active  vibration  control  Electro-active  polymer  (EAP)  Heaviside  function  Ionic  polymer  metal  composite  (IPMC) Index. décimale : 629.1 Résumé : This paper evaluates the effectiveness and performance of ionic polymer metal composite (IPMC)-based active vibration control scheme equipped with the Kalman estimation algorithm. To assess the vibration attenuation efficiency, a rotating flexible manipulator has been modelled integrating two IPMC actuators following the modal approach. The elastic displacements as generalized coordinates for estimating optimal performance is carried out next by discretizing the elastic motion through the assumed mode technique and applying the Kalman filter. Simulations are then performed to demonstrate effective vibration attenuation using both IPMC and the Kalman filter. Kalman filter is employed for the whole vibrating system taking into account of the bending moment generated by the IPMC actuator. Experiment is conducted for the proposed damping scheme and the results are compared and verified with the simulation results. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5393036

Synthesis and experimental validation of the novel LQ-NEMCSI adaptive strategy on an electronic throttle valve / Mario di Bernardo in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1325-1337 Titre : Synthesis and experimental validation of the novel LQ-NEMCSI adaptive strategy on an electronic throttle valve Type de document : texte imprimé Auteurs : Mario di Bernardo, Auteur ; Alessandro di Gaeta, Auteur ; Umberto Montanaro, Auteur Année de publication : 2011 Article en page(s) : pp. 1325-1337 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive  control  Automotive  control  Mechatronic  Nonlinear  control  Piecewise  smooth  systems Index. décimale : 629.1 Résumé : This paper is concerned with the design of a novel adaptive controller, namely the linear quadratic new extended minimal control synthesis with integral action (LQ-NEMCSI). We present for the first time the analytical proof of asymptotic stability of the controller and experimental evidence of the algorithm effectiveness for controlling an electronic throttle body: an element of any drive-by-wire system in automotive engineering, affected by many nonlinear perturbations. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5378488 [article] Synthesis and experimental validation of the novel LQ-NEMCSI adaptive strategy on an electronic throttle valve [texte imprimé] / Mario di Bernardo, Auteur ; Alessandro di Gaeta, Auteur ; Umberto Montanaro, Auteur . - 2011 . - pp. 1325-1337. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1325-1337 Mots-clés : Adaptive  control  Automotive  control  Mechatronic  Nonlinear  control  Piecewise  smooth  systems Index. décimale : 629.1 Résumé : This paper is concerned with the design of a novel adaptive controller, namely the linear quadratic new extended minimal control synthesis with integral action (LQ-NEMCSI). We present for the first time the analytical proof of asymptotic stability of the controller and experimental evidence of the algorithm effectiveness for controlling an electronic throttle body: an element of any drive-by-wire system in automotive engineering, affected by many nonlinear perturbations. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5378488

The control system of a distributed aperture imaging testbed / Mel Ni in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1338-1344 Titre : The control system of a distributed aperture imaging testbed Type de document : texte imprimé Auteurs : Mel Ni, Auteur ; Jean-Noel Aubrun, Auteur ; Mike Bishop, Auteur Année de publication : 2011 Article en page(s) : pp. 1338-1344 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Active  optics  control  system  Distributed  aperture  Fizeau  imaging  system  Multiple  telescope  array  Phased  array  telescope Index. décimale : 629.1 Résumé : Star-9 is an experimental demonstration of distributed-aperture imaging built at the Lockheed Martin Advanced Technology Center. White light from a scene generator enters an array of nine telescopes and is combined at a focused image plane. Relative aberrations from each telescope are regulated by a control system using phase diversity and active relay mirrors. A Weiner filter is applied to the image, and the resulting angular resolution and image quality are nearly diffraction-limited with the diameter of the array. The control system takes estimates from the phase diversity algorithm and uses them to command mirrors to adjust tip, tilt, and piston in each telescope. Each active mirror has inductive position sensors for local position control. The mirrors are actuated by picomotors and inchworm motors. In addition to tip/tilt/piston errors, the control system is equipped to correct for pupil geometry and rotation errors, and to perform field of regard steering. In this paper, we present details on the control system's local sensing, control law synthesis, and precision actuation methodology. We also describe the incorporation of phase diversity and automated phasing algorithms with the control system and give performance results. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5393014 [article] The control system of a distributed aperture imaging testbed [texte imprimé] / Mel Ni, Auteur ; Jean-Noel Aubrun, Auteur ; Mike Bishop, Auteur . - 2011 . - pp. 1338-1344. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1338-1344 Mots-clés : Active  optics  control  system  Distributed  aperture  Fizeau  imaging  system  Multiple  telescope  array  Phased  array  telescope Index. décimale : 629.1 Résumé : Star-9 is an experimental demonstration of distributed-aperture imaging built at the Lockheed Martin Advanced Technology Center. White light from a scene generator enters an array of nine telescopes and is combined at a focused image plane. Relative aberrations from each telescope are regulated by a control system using phase diversity and active relay mirrors. A Weiner filter is applied to the image, and the resulting angular resolution and image quality are nearly diffraction-limited with the diameter of the array. The control system takes estimates from the phase diversity algorithm and uses them to command mirrors to adjust tip, tilt, and piston in each telescope. Each active mirror has inductive position sensors for local position control. The mirrors are actuated by picomotors and inchworm motors. In addition to tip/tilt/piston errors, the control system is equipped to correct for pupil geometry and rotation errors, and to perform field of regard steering. In this paper, we present details on the control system's local sensing, control law synthesis, and precision actuation methodology. We also describe the incorporation of phase diversity and automated phasing algorithms with the control system and give performance results. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5393014

Control of tower cranes with double-pendulum payload dynamics / Joshua Vaughan in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1063-6536 Titre : Control of tower cranes with double-pendulum payload dynamics Type de document : texte imprimé Auteurs : Joshua Vaughan, Auteur ; Dooroo Kim, Auteur ; Singhose, Wiliam, Auteur Année de publication : 2011 Article en page(s) : pp. 1063-6536 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Cranes  Input  shaping  Tower  crane  oscillation  Vibration Index. décimale : 629.1 Résumé : The usefulness of cranes is limited because the payload is supported by an overhead suspension cable that allows oscillation to occur during crane motion. Under certain conditions, the payload dynamics may introduce an additional oscillatory mode that creates a double pendulum. This paper presents an analysis of this effect on tower cranes. This paper also reviews a command generation technique to suppress the oscillatory dynamics with robustness to frequency changes. Experimental results are presented to verify that the proposed method can improve the ability of crane operators to drive a double-pendulum tower crane. The performance improvements occurred during both local and teleoperated control. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5422812 [article] Control of tower cranes with double-pendulum payload dynamics [texte imprimé] / Joshua Vaughan, Auteur ; Dooroo Kim, Auteur ; Singhose, Wiliam, Auteur . - 2011 . - pp. 1063-6536. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1063-6536 Mots-clés : Cranes  Input  shaping  Tower  crane  oscillation  Vibration Index. décimale : 629.1 Résumé : The usefulness of cranes is limited because the payload is supported by an overhead suspension cable that allows oscillation to occur during crane motion. Under certain conditions, the payload dynamics may introduce an additional oscillatory mode that creates a double pendulum. This paper presents an analysis of this effect on tower cranes. This paper also reviews a command generation technique to suppress the oscillatory dynamics with robustness to frequency changes. Experimental results are presented to verify that the proposed method can improve the ability of crane operators to drive a double-pendulum tower crane. The performance improvements occurred during both local and teleoperated control. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5422812

Uncalibrated visual tracking control without visual velocity / Hesheng Wang in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1359-1370 Titre : Uncalibrated visual tracking control without visual velocity Type de document : texte imprimé Auteurs : Hesheng Wang, Auteur ; Yun-Hui Liu, Auteur ; Weidong Chen, Auteur Année de publication : 2011 Article en page(s) : pp. 1359-1370 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive  control  Tracking  control  Visual  servoing  Visual  velocity Index. décimale : 629.1 Résumé : This paper presents a new adaptive controller for image-based tracking of a robot manipulator without using visual velocity when the intrinsic and extrinsic parameters of the camera are not calibrated. Most of existing controllers require the measurement of the visual velocity, which is subject to big noises in general due to low sampling rates of the vision loop. To avoid performance decaying caused by measurement errors of the visual velocity we propose a new image-based tracking controller based on the proposal of an estimator of visual velocity. With a full consideration of dynamic responses of the robot manipulator, we proved the convergence of the image errors of the trajectory to zero and the convergence of the estimated parameters to the real values up to a scale by the Lyapunov method. Experiments have been conducted to demonstrate good convergence of the trajectory errors under the control of the proposed method. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5419975 [article] Uncalibrated visual tracking control without visual velocity [texte imprimé] / Hesheng Wang, Auteur ; Yun-Hui Liu, Auteur ; Weidong Chen, Auteur . - 2011 . - pp. 1359-1370. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1359-1370 Mots-clés : Adaptive  control  Tracking  control  Visual  servoing  Visual  velocity Index. décimale : 629.1 Résumé : This paper presents a new adaptive controller for image-based tracking of a robot manipulator without using visual velocity when the intrinsic and extrinsic parameters of the camera are not calibrated. Most of existing controllers require the measurement of the visual velocity, which is subject to big noises in general due to low sampling rates of the vision loop. To avoid performance decaying caused by measurement errors of the visual velocity we propose a new image-based tracking controller based on the proposal of an estimator of visual velocity. With a full consideration of dynamic responses of the robot manipulator, we proved the convergence of the image errors of the trajectory to zero and the convergence of the estimated parameters to the real values up to a scale by the Lyapunov method. Experiments have been conducted to demonstrate good convergence of the trajectory errors under the control of the proposed method. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5419975

Multiplexed MPC for multizone thermal processing in semiconductor manufacturing / K.V. Ling in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1371-1380 Titre : Multiplexed MPC for multizone thermal processing in semiconductor manufacturing Type de document : texte imprimé Auteurs : K.V. Ling, Auteur ; W.K. Ho, Auteur ; B.F. Wu, Auteur Année de publication : 2011 Article en page(s) : pp. 1371-1380 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Feed-forward  Model  predictive  (MPC)  Multiplexed  Process  control  Semiconductor  manufacturing  Temperature  control Index. décimale : 629.1 Résumé : It is known that a faster sampling rate allows a controller to react to unmeasurable disturbances faster. Adding feed- forward could decrease the effect of disturbance significantly, but feedback control is still required to cope with modelling errors and unknown disturbances. A variant of model predictive control (MPC), called multiplexed MPC (MMPC), has been proposed recently. The motivation for MMPC was to reduced real-time computational load and hence allow faster sampling on multivariable systems. In this brief, we report the first successful application of MMPC on a semiconductor manufacturing process. MMPC with feedforward has been demonstrated experimentally on a multizone bake plate application. While most of the temperature drop will be compensated by feedforward control, feedback provided by MMPC will cope with the errors due to warped wafers. This result is important for the semiconductor wafer baking process, because temperature nonuniformity will affect critical dimension of the wafer. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5352253 [article] Multiplexed MPC for multizone thermal processing in semiconductor manufacturing [texte imprimé] / K.V. Ling, Auteur ; W.K. Ho, Auteur ; B.F. Wu, Auteur . - 2011 . - pp. 1371-1380. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1371-1380 Mots-clés : Feed-forward  Model  predictive  (MPC)  Multiplexed  Process  control  Semiconductor  manufacturing  Temperature  control Index. décimale : 629.1 Résumé : It is known that a faster sampling rate allows a controller to react to unmeasurable disturbances faster. Adding feed- forward could decrease the effect of disturbance significantly, but feedback control is still required to cope with modelling errors and unknown disturbances. A variant of model predictive control (MPC), called multiplexed MPC (MMPC), has been proposed recently. The motivation for MMPC was to reduced real-time computational load and hence allow faster sampling on multivariable systems. In this brief, we report the first successful application of MMPC on a semiconductor manufacturing process. MMPC with feedforward has been demonstrated experimentally on a multizone bake plate application. While most of the temperature drop will be compensated by feedforward control, feedback provided by MMPC will cope with the errors due to warped wafers. This result is important for the semiconductor wafer baking process, because temperature nonuniformity will affect critical dimension of the wafer. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5352253

Data-driven multi-stage motion planning of parallel kinematic machines / Amar Khoukhi in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1381-1389 Titre : Data-driven multi-stage motion planning of parallel kinematic machines Type de document : texte imprimé Auteurs : Amar Khoukhi, Auteur Année de publication : 2011 Article en page(s) : pp. 1381-1389 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Augmented  Lagrangian  Data-driven  neuro-fuzzy  systems  Decoupling  Multiobjective  trajectory  planning  Parallel  kinematic  machines  Subtractive  clustering Index. décimale : 629.1 Résumé : A multistage data-driven neuro-fuzzy system is considered for the multiobjective trajectory planning of Parallel Kinematic Machines (PKMs). This system is developed in two major steps. First, an offline planning based on robot kinematic and dynamic models, including actuators, is performed to generate a large dataset of trajectories, covering most of the robot workspace and minimizing time and energy, while avoiding singularities and limits on joint angles, rates, accelerations, and torques. An augmented Lagrangian technique is implemented on a decoupled form of the PKM dynamics in order to solve the resulting nonlinear constrained optimal control problem. Then, the outcomes of the offline-planning are used to build a data-driven neuro-fuzzy inference system to learn and capture the desired dynamic behavior of the PKM. Once this system is optimized, it is used to achieve near-optimal online planning with a reasonable time complexity. Simulations proving the effectiveness of this approach on a 2-degrees-of-freedom planar PKM are given and discussed. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5357404 [article] Data-driven multi-stage motion planning of parallel kinematic machines [texte imprimé] / Amar Khoukhi, Auteur . - 2011 . - pp. 1381-1389. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1381-1389 Mots-clés : Augmented  Lagrangian  Data-driven  neuro-fuzzy  systems  Decoupling  Multiobjective  trajectory  planning  Parallel  kinematic  machines  Subtractive  clustering Index. décimale : 629.1 Résumé : A multistage data-driven neuro-fuzzy system is considered for the multiobjective trajectory planning of Parallel Kinematic Machines (PKMs). This system is developed in two major steps. First, an offline planning based on robot kinematic and dynamic models, including actuators, is performed to generate a large dataset of trajectories, covering most of the robot workspace and minimizing time and energy, while avoiding singularities and limits on joint angles, rates, accelerations, and torques. An augmented Lagrangian technique is implemented on a decoupled form of the PKM dynamics in order to solve the resulting nonlinear constrained optimal control problem. Then, the outcomes of the offline-planning are used to build a data-driven neuro-fuzzy inference system to learn and capture the desired dynamic behavior of the PKM. Once this system is optimized, it is used to achieve near-optimal online planning with a reasonable time complexity. Simulations proving the effectiveness of this approach on a 2-degrees-of-freedom planar PKM are given and discussed. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5357404

Global adaptive output feedback tracking control of an unmanned aerial vehicle / W. MacKunis in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1390-1397 Titre : Global adaptive output feedback tracking control of an unmanned aerial vehicle Type de document : texte imprimé Auteurs : W. MacKunis, Auteur ; Z.D. Wilcox, Auteur ; M.K. Kaiser, Auteur Année de publication : 2011 Article en page(s) : pp. 1390-1397 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive  control  Dynamic  inversion  (DI)  Lyapunov  methods  Nonlinear  control  Robust  control Index. décimale : 629.1 Résumé : An output feedback (OFB) dynamic inversion control strategy is developed for an unmanned aerial vehicle (UAV) that achieves global asymptotic tracking of a reference model. The UAV is modeled as an uncertain linear time-invariant (LTI) system with an additive bounded nonvanishing nonlinear disturbance. A continuous tracking controller is designed to mitigate the nonlinear disturbance and inversion error, and an adaptive law is utilized to compensate for the parametric uncertainty. Global asymptotic tracking of the measurable output states is proven via a Lyapunov-like stability analysis, and high-fidelity simulation results are provided to illustrate the applicability and performance of the developed control law. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5357472 [article] Global adaptive output feedback tracking control of an unmanned aerial vehicle [texte imprimé] / W. MacKunis, Auteur ; Z.D. Wilcox, Auteur ; M.K. Kaiser, Auteur . - 2011 . - pp. 1390-1397. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1390-1397 Mots-clés : Adaptive  control  Dynamic  inversion  (DI)  Lyapunov  methods  Nonlinear  control  Robust  control Index. décimale : 629.1 Résumé : An output feedback (OFB) dynamic inversion control strategy is developed for an unmanned aerial vehicle (UAV) that achieves global asymptotic tracking of a reference model. The UAV is modeled as an uncertain linear time-invariant (LTI) system with an additive bounded nonvanishing nonlinear disturbance. A continuous tracking controller is designed to mitigate the nonlinear disturbance and inversion error, and an adaptive law is utilized to compensate for the parametric uncertainty. Global asymptotic tracking of the measurable output states is proven via a Lyapunov-like stability analysis, and high-fidelity simulation results are provided to illustrate the applicability and performance of the developed control law. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5357472

Load torque estimation and passivity-based control of a boost-converter/DC-motor combination / Jesus Linares-Flores in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp.1398-1405 Titre : Load torque estimation and passivity-based control of a boost-converter/DC-motor combination Type de document : texte imprimé Auteurs : Jesus Linares-Flores, Auteur ; Johann Reger, Auteur ; Sira-Ramirez, Hebertt, Auteur Année de publication : 2011 Article en page(s) : pp.1398-1405 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Algebraic  estimation  Electrial  drives  Flatness-based  trajectory  planning  Passivity-based  control  Power  electronics Index. décimale : 629.1 Résumé : An algebraic approach is presented for the fast feed-forward adaptation of the angular velocity trajectory tracking task in a Boost-converter driven dc-motor system. For the adaptation, the load torque perturbations are assumed piecewise constant and are, nonasymptotically, online estimated using the available noisy measurements of the state variables. The controller is a linear controller based on the exact tracking error dynamics passive output feedback (ETEDPOF) controller design methodology including suitable adaptive feed-forward precompensation depending explicitly on the precisely estimated torque. The performance of the adaptation, which is achieved by means of the algebraic online-estimation of the current unknown load torque, is successfully validated in an experimental laboratory setup. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5409504 [article] Load torque estimation and passivity-based control of a boost-converter/DC-motor combination [texte imprimé] / Jesus Linares-Flores, Auteur ; Johann Reger, Auteur ; Sira-Ramirez, Hebertt, Auteur . - 2011 . - pp.1398-1405. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp.1398-1405 Mots-clés : Algebraic  estimation  Electrial  drives  Flatness-based  trajectory  planning  Passivity-based  control  Power  electronics Index. décimale : 629.1 Résumé : An algebraic approach is presented for the fast feed-forward adaptation of the angular velocity trajectory tracking task in a Boost-converter driven dc-motor system. For the adaptation, the load torque perturbations are assumed piecewise constant and are, nonasymptotically, online estimated using the available noisy measurements of the state variables. The controller is a linear controller based on the exact tracking error dynamics passive output feedback (ETEDPOF) controller design methodology including suitable adaptive feed-forward precompensation depending explicitly on the precisely estimated torque. The performance of the adaptation, which is achieved by means of the algebraic online-estimation of the current unknown load torque, is successfully validated in an experimental laboratory setup. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5409504

Preventing thermal overloads in transmission circuits via model predictive control / Juliano S. A. Carneiro in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1406-1412 Titre : Preventing thermal overloads in transmission circuits via model predictive control Type de document : texte imprimé Auteurs : Juliano S. A. Carneiro, Auteur ; Luca Ferrarini, Auteur Année de publication : 2011 Article en page(s) : pp. 1406-1412 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Model  predictive  control  (MPC)  Power  transmision  lines  Thermal  overloads  Weather  forecasting Index. décimale : 629.1 Résumé : A special protection scheme (SPS) based on model predictive control (MPC) is proposed to mitigate thermal overloads in advance, and so avoid cascade line tripping. The controller aims to keep the temperatures of conductors below their admissible limits before local relays intervene and trip out the lines. This objective is carried out by properly coordinating different control actions available in power systems, while minimizing a suitable cost function subject to explicit constraints on the conductor temperatures. The temperatures of transmission lines are predicted using a thermal model of bare overhead conductors. The electrical currents are obtained from the dc power-flow approximation of electric networks, whereas dynamic stochastic autoregressive integrated moving average models are used to describe the weather variables. Simulation results reveal that the proposed scheme might increase significantly the reliability of thermal control SPSs and reduce the overall efforts required to fulfill the control objectives. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5373899 [article] Preventing thermal overloads in transmission circuits via model predictive control [texte imprimé] / Juliano S. A. Carneiro, Auteur ; Luca Ferrarini, Auteur . - 2011 . - pp. 1406-1412. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1406-1412 Mots-clés : Model  predictive  control  (MPC)  Power  transmision  lines  Thermal  overloads  Weather  forecasting Index. décimale : 629.1 Résumé : A special protection scheme (SPS) based on model predictive control (MPC) is proposed to mitigate thermal overloads in advance, and so avoid cascade line tripping. The controller aims to keep the temperatures of conductors below their admissible limits before local relays intervene and trip out the lines. This objective is carried out by properly coordinating different control actions available in power systems, while minimizing a suitable cost function subject to explicit constraints on the conductor temperatures. The temperatures of transmission lines are predicted using a thermal model of bare overhead conductors. The electrical currents are obtained from the dc power-flow approximation of electric networks, whereas dynamic stochastic autoregressive integrated moving average models are used to describe the weather variables. Simulation results reveal that the proposed scheme might increase significantly the reliability of thermal control SPSs and reduce the overall efforts required to fulfill the control objectives. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5373899

Self-organizing fuzzy controller for gas-assisted injection molding combination systems / Jeen Lin in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1413-1421 Titre : Self-organizing fuzzy controller for gas-assisted injection molding combination systems Type de document : texte imprimé Auteurs : Jeen Lin, Auteur ; Ruey-Jing Lian, Auteur Année de publication : 2011 Article en page(s) : pp. 1413-1421 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Fuzzy  logic  controller  Gas-assisted  injection  modeling  Self-organizing  fuzzy  controller Index. décimale : 629.1 Résumé : This study designed and constructed a gas-assisted injection molding system and incorporated it into a traditional injection molding machine. This combined system was referred to as the “gas-assisted injection molding combination system” (GAIMCS). The GAIMCS has complicated and uncertain dynamics, so it is impractical to design model-based controllers for this kind of system. To address this problem, this work developed a model-free self-organizing fuzzy controller (SOFC) to control the GAIMCS and evaluated its control performance. The SOFC has learning ability, which can regulate fuzzy control rules in real time during the control process. The initial fuzzy control rules for the SOFC can be set to zero before the onset of learning. The SOFC achieved better control performance than the fuzzy logic controller or the proportional-integral-derivative controller for high-pressure gas control in the GAIMCS, as confirmed by the experimental results. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5392980 [article] Self-organizing fuzzy controller for gas-assisted injection molding combination systems [texte imprimé] / Jeen Lin, Auteur ; Ruey-Jing Lian, Auteur . - 2011 . - pp. 1413-1421. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1413-1421 Mots-clés : Fuzzy  logic  controller  Gas-assisted  injection  modeling  Self-organizing  fuzzy  controller Index. décimale : 629.1 Résumé : This study designed and constructed a gas-assisted injection molding system and incorporated it into a traditional injection molding machine. This combined system was referred to as the “gas-assisted injection molding combination system” (GAIMCS). The GAIMCS has complicated and uncertain dynamics, so it is impractical to design model-based controllers for this kind of system. To address this problem, this work developed a model-free self-organizing fuzzy controller (SOFC) to control the GAIMCS and evaluated its control performance. The SOFC has learning ability, which can regulate fuzzy control rules in real time during the control process. The initial fuzzy control rules for the SOFC can be set to zero before the onset of learning. The SOFC achieved better control performance than the fuzzy logic controller or the proportional-integral-derivative controller for high-pressure gas control in the GAIMCS, as confirmed by the experimental results. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5392980

A Hybrid fault detection and isolation strategy for a network of unmanned vehicles in presence of large environmental disturbances / N. Meskin in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1422-1429 Titre : A Hybrid fault detection and isolation strategy for a network of unmanned vehicles in presence of large environmental disturbances Type de document : texte imprimé Auteurs : N. Meskin, Auteur ; Khorasani, K., Auteur ; Rabbath, C. A., Auteur Année de publication : 2011 Article en page(s) : pp. 1422-1429 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Fault  detection  and  isolation  (FDI)  Hybrid  fault  diagnosis  Large  environmental  disturbances  Network  of  unnanned  systems Index. décimale : 629.1 Résumé : In this brief, the problem of designing and developing a hybrid fault detection and isolation (FDI) scheme for a network of unmanned vehicles (NUVs) that is subject to large environmental disturbances is investigated. The proposed FDI algorithm is a hybrid architecture that is composed of a bank of continuous-time residual generators and a discrete-event system (DES) fault diagnoser. A novel set of residuals is generated so that the DES fault diagnoser empowered by incorporating appropriate combinations of the residuals and their sequential features will robustly detect and isolate faults in the NUVs. Our proposed hybrid FDI algorithm is then applied to actuator fault detection and isolation in a network of quad-rotors. Simulation results demonstrate and validate the performance capabilities of our proposed hybrid FDI algorithm. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5378507 [article] A Hybrid fault detection and isolation strategy for a network of unmanned vehicles in presence of large environmental disturbances [texte imprimé] / N. Meskin, Auteur ; Khorasani, K., Auteur ; Rabbath, C. A., Auteur . - 2011 . - pp. 1422-1429. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1422-1429 Mots-clés : Fault  detection  and  isolation  (FDI)  Hybrid  fault  diagnosis  Large  environmental  disturbances  Network  of  unnanned  systems Index. décimale : 629.1 Résumé : In this brief, the problem of designing and developing a hybrid fault detection and isolation (FDI) scheme for a network of unmanned vehicles (NUVs) that is subject to large environmental disturbances is investigated. The proposed FDI algorithm is a hybrid architecture that is composed of a bank of continuous-time residual generators and a discrete-event system (DES) fault diagnoser. A novel set of residuals is generated so that the DES fault diagnoser empowered by incorporating appropriate combinations of the residuals and their sequential features will robustly detect and isolate faults in the NUVs. Our proposed hybrid FDI algorithm is then applied to actuator fault detection and isolation in a network of quad-rotors. Simulation results demonstrate and validate the performance capabilities of our proposed hybrid FDI algorithm. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5378507

Robust nonlinear predictive control applied to a solar collector field in a solar desalination plant / Bismark Claure Torrico in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1430-1439 Titre : Robust nonlinear predictive control applied to a solar collector field in a solar desalination plant Type de document : texte imprimé Auteurs : Bismark Claure Torrico, Auteur ; Lidia Roca, Auteur ; Julio Elias Normey-Rico, Auteur Année de publication : 2011 Article en page(s) : pp. 1430-1439 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Dead-time  compensator  Nonlinear  extended  prediction  self-adaptive  control  (NEPSAC)  Nonlinear  predictive  control  Robust  control  Solar  plant Index. décimale : 629.1 Résumé : This brief presents the application of a robust nonlinear predictive controller to the distributed collector field of a solar desalination plant. The main purpose of the controller is to manipulate the water flow rate to maintain the collector outlet-inlet temperature gradient constant in spite of disturbances. The controller uses a robust dead-time compensation structure and a nonlinear model predictive control to cope with time delay uncertainties and system nonlinearities, respectively. Simulation and real experimental results are shown to illustrate controller performance. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5395632 [article] Robust nonlinear predictive control applied to a solar collector field in a solar desalination plant [texte imprimé] / Bismark Claure Torrico, Auteur ; Lidia Roca, Auteur ; Julio Elias Normey-Rico, Auteur . - 2011 . - pp. 1430-1439. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1430-1439 Mots-clés : Dead-time  compensator  Nonlinear  extended  prediction  self-adaptive  control  (NEPSAC)  Nonlinear  predictive  control  Robust  control  Solar  plant Index. décimale : 629.1 Résumé : This brief presents the application of a robust nonlinear predictive controller to the distributed collector field of a solar desalination plant. The main purpose of the controller is to manipulate the water flow rate to maintain the collector outlet-inlet temperature gradient constant in spite of disturbances. The controller uses a robust dead-time compensation structure and a nonlinear model predictive control to cope with time delay uncertainties and system nonlinearities, respectively. Simulation and real experimental results are shown to illustrate controller performance. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5395632

Design of a hybrid stable adaptive fuzzy controller employing Lyapunov theory and harmony search algorithm / Kaushik Das Sharma in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1440-1447 Titre : Design of a hybrid stable adaptive fuzzy controller employing Lyapunov theory and harmony search algorithm Type de document : texte imprimé Auteurs : Kaushik Das Sharma, Auteur ; Amitava Chatterjee, Auteur ; Anjan Rakshit, Auteur Année de publication : 2011 Article en page(s) : pp. 1440-1447 Note générale : Génie Aéropatial Langues : Anglais (eng) Mots-clés : Adaptive  fuzzy  logic  controllers  (AFLCs)  Harmony  search  algorithm  Hybrid  approaches  Lyapunov  theory  Stochastic  optimization Index. décimale : 629.1 Résumé : This brief proposes hybrid stable adaptive fuzzy controller design procedures utilizing the conventional Lyapunov theory and, the relatively newly devised harmony search (HS) algorithm-based stochastic approach. The objective is to design a self-adaptive fuzzy controller, optimizing both its structures and free parameters, such that the designed controller can guarantee desired stability and simultaneously it can provide satisfactory performance with a high degree of automation in the design process. Two different variants of the hybrid controller are proposed in this work. These variants are implemented for a benchmark simulation case study and real-life experimentation. The results obtained demonstrate the usefulness of the proposed approach. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5395645 [article] Design of a hybrid stable adaptive fuzzy controller employing Lyapunov theory and harmony search algorithm [texte imprimé] / Kaushik Das Sharma, Auteur ; Amitava Chatterjee, Auteur ; Anjan Rakshit, Auteur . - 2011 . - pp. 1440-1447. Génie Aéropatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1440-1447 Mots-clés : Adaptive  fuzzy  logic  controllers  (AFLCs)  Harmony  search  algorithm  Hybrid  approaches  Lyapunov  theory  Stochastic  optimization Index. décimale : 629.1 Résumé : This brief proposes hybrid stable adaptive fuzzy controller design procedures utilizing the conventional Lyapunov theory and, the relatively newly devised harmony search (HS) algorithm-based stochastic approach. The objective is to design a self-adaptive fuzzy controller, optimizing both its structures and free parameters, such that the designed controller can guarantee desired stability and simultaneously it can provide satisfactory performance with a high degree of automation in the design process. Two different variants of the hybrid controller are proposed in this work. These variants are implemented for a benchmark simulation case study and real-life experimentation. The results obtained demonstrate the usefulness of the proposed approach. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5395645

Asymptotic tracking for aircraft via robust and adaptive dynamic Inversion methods / W. MacKunis in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1448-1456 Titre : Asymptotic tracking for aircraft via robust and adaptive dynamic Inversion methods Type de document : texte imprimé Auteurs : W. MacKunis, Auteur ; P.M. Patre, Auteur ; M.K. Kaiser, Auteur Année de publication : 2011 Article en page(s) : pp. 1448-1456 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive  control  Aircraft  tracking  Dynamic  inversion  Lyapunov  methods  Nonlinear  control  Robust  control Index. décimale : 629.1 Résumé : Two asymptotic tracking controllers are designed in this paper, which combine model reference adaptive control and dynamic inversion methodologies in conjunction with the robust integral of the signum of the error (RISE) technique for output tracking of an aircraft system in the presence of parametric uncertainty and unknown, nonlinear disturbances, which are not linearly parameterizable (non-LP). The control designs are complicated by the fact that the control input is multiplied by an uncertain, non-square matrix. A robust control design is presented first, in which partial knowledge of the aircraft model along with constant feedforward estimates of the unknown input parameters are used with a robust control term to stabilize the system. Motivated by the desire to reduce the need for high-gain feedback, an adaptive extension is then presented, in which feedforward adaptive estimates of the input uncertainty are used. These results show how asymptotic tracking control can be achieved for a nonlinear system in the presence of a non-square input matrix containing parametric uncertainty and nonlinear, non-LP disturbances. Asymptotic output tracking is proven via Lyapunov stability analysis, and high-fidelity simulation results are provided to verify the efficacy of the proposed controllers. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5405093 [article] Asymptotic tracking for aircraft via robust and adaptive dynamic Inversion methods [texte imprimé] / W. MacKunis, Auteur ; P.M. Patre, Auteur ; M.K. Kaiser, Auteur . - 2011 . - pp. 1448-1456. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1448-1456 Mots-clés : Adaptive  control  Aircraft  tracking  Dynamic  inversion  Lyapunov  methods  Nonlinear  control  Robust  control Index. décimale : 629.1 Résumé : Two asymptotic tracking controllers are designed in this paper, which combine model reference adaptive control and dynamic inversion methodologies in conjunction with the robust integral of the signum of the error (RISE) technique for output tracking of an aircraft system in the presence of parametric uncertainty and unknown, nonlinear disturbances, which are not linearly parameterizable (non-LP). The control designs are complicated by the fact that the control input is multiplied by an uncertain, non-square matrix. A robust control design is presented first, in which partial knowledge of the aircraft model along with constant feedforward estimates of the unknown input parameters are used with a robust control term to stabilize the system. Motivated by the desire to reduce the need for high-gain feedback, an adaptive extension is then presented, in which feedforward adaptive estimates of the input uncertainty are used. These results show how asymptotic tracking control can be achieved for a nonlinear system in the presence of a non-square input matrix containing parametric uncertainty and nonlinear, non-LP disturbances. Asymptotic output tracking is proven via Lyapunov stability analysis, and high-fidelity simulation results are provided to verify the efficacy of the proposed controllers. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5405093

Realizing fault-tolerant asynchronous sequential machines using corrective control / Jung-Min Yang in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1457-1463 Titre : Realizing fault-tolerant asynchronous sequential machines using corrective control Type de document : texte imprimé Auteurs : Jung-Min Yang, Auteur ; Seong Woo Kwak, Auteur Année de publication : 2011 Article en page(s) : pp. 1457-1463 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Asynchronous  sequential  machines  Corrective  control  State  fault  tolerance  Triple  modular  redundancy  (TMR) Index. décimale : 629.1 Résumé : A control scheme is presented for realizing state fault-tolerance of asynchronous sequential machines. An unobservable disturbance input can infiltrate into asynchronous machines and provoke unauthorized state transitions. The objective is to propose automatic state feedback controllers that detect penetration of the disturbance input and counteract state faults so as to return the controlled machine to its original state. A necessary and sufficient condition for the existence of such a controller is presented in a theoretical framework and an architecture of asynchronous triple modular redundancy is addressed as a case study. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5405094 [article] Realizing fault-tolerant asynchronous sequential machines using corrective control [texte imprimé] / Jung-Min Yang, Auteur ; Seong Woo Kwak, Auteur . - 2011 . - pp. 1457-1463. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1457-1463 Mots-clés : Asynchronous  sequential  machines  Corrective  control  State  fault  tolerance  Triple  modular  redundancy  (TMR) Index. décimale : 629.1 Résumé : A control scheme is presented for realizing state fault-tolerance of asynchronous sequential machines. An unobservable disturbance input can infiltrate into asynchronous machines and provoke unauthorized state transitions. The objective is to propose automatic state feedback controllers that detect penetration of the disturbance input and counteract state faults so as to return the controlled machine to its original state. A necessary and sufficient condition for the existence of such a controller is presented in a theoretical framework and an architecture of asynchronous triple modular redundancy is addressed as a case study. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5405094

Elimination of vibration localization in a micro/nanomechanical resonator array / Alok Sinha in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1464-1468 Titre : Elimination of vibration localization in a micro/nanomechanical resonator array Type de document : texte imprimé Auteurs : Alok Sinha, Auteur Année de publication : 2011 Article en page(s) : pp. 1464-1468 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Control  Disorder  Feedforward  function  Micromechanical  resonator  array  Mistuning  Monte  Carlo  simulation  Nanomechanical  resonator  array  Random  Vibration  localization Index. décimale : 629.1 Résumé : A novel method has been developed to eliminate the vibration localization problem in a micro/nanomechanical resonator array with inevitable random disorder or mistuning in the system. This approach is based on the preprocessing of the input signal via a feedforward function. The derivation of this feedforward function is presented. Results from numerical simulations are presented to corroborate the validity of the proposed approach. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5439905 [article] Elimination of vibration localization in a micro/nanomechanical resonator array [texte imprimé] / Alok Sinha, Auteur . - 2011 . - pp. 1464-1468. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1464-1468 Mots-clés : Control  Disorder  Feedforward  function  Micromechanical  resonator  array  Mistuning  Monte  Carlo  simulation  Nanomechanical  resonator  array  Random  Vibration  localization Index. décimale : 629.1 Résumé : A novel method has been developed to eliminate the vibration localization problem in a micro/nanomechanical resonator array with inevitable random disorder or mistuning in the system. This approach is based on the preprocessing of the input signal via a feedforward function. The derivation of this feedforward function is presented. Results from numerical simulations are presented to corroborate the validity of the proposed approach. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5439905

A Study of the Lyapunov stability of an open-loop induction machine / Ahmed Oteafy in IEEE Transactions on control systems technology, Vol. 18 N° 6 (Novembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1469-1476 Titre : A Study of the Lyapunov stability of an open-loop induction machine Type de document : texte imprimé Auteurs : Ahmed Oteafy, Auteur ; John Chiasson, Auteur Année de publication : 2011 Article en page(s) : pp. 1469-1476 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Global  asymptotic  stability  Induction  motor  Lyapunov  stability  Open-loop  stability  Power  balance  Equation Index. décimale : 629.1 Résumé : The induction motor is widely utilized in industry and exists in a plethora of applications. Until the last 20 years or so, it was primarily used in an open-loop fashion (i.e., balanced sinusoidal voltages, constant load torque and viscous friction) with its inherent stability counted on to allow operation over a wide range of operating conditions. Unlike classical arguments based on the steady-state torque-slip curve, a rigorous analytical stability argument using the full nonlinear dynamical model is presented. In particular, conditions for global asymptotic stability of the induction motor in the sense of Lyapunov are given in terms of the motor parameters, operating slip, and synchronous frequency. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5416335 [article] A Study of the Lyapunov stability of an open-loop induction machine [texte imprimé] / Ahmed Oteafy, Auteur ; John Chiasson, Auteur . - 2011 . - pp. 1469-1476. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 6 (Novembre 2010) . - pp. 1469-1476 Mots-clés : Global  asymptotic  stability  Induction  motor  Lyapunov  stability  Open-loop  stability  Power  balance  Equation Index. décimale : 629.1 Résumé : The induction motor is widely utilized in industry and exists in a plethora of applications. Until the last 20 years or so, it was primarily used in an open-loop fashion (i.e., balanced sinusoidal voltages, constant load torque and viscous friction) with its inherent stability counted on to allow operation over a wide range of operating conditions. Unlike classical arguments based on the steady-state torque-slip curve, a rigorous analytical stability argument using the full nonlinear dynamical model is presented. In particular, conditions for global asymptotic stability of the induction motor in the sense of Lyapunov are given in terms of the motor parameters, operating slip, and synchronous frequency. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5416335

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