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IEEE Transactions on control systems technology |
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Ajouter le résultat dans votre panierControl design of electrically assisted boosting systems for diesel powertrain applications / Bradley Charles Glenn in IEEE Transactions on control systems technology, Vol. 18 N° 4 (Juillet 2010)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 769-778
Titre : Control design of electrically assisted boosting systems for diesel powertrain applications Type de document : texte imprimé Auteurs : Bradley Charles Glenn, Auteur ; Devesh Upadhyay, Auteur ; Gregory N. Washington, Auteur Année de publication : 2011 Article en page(s) : pp. 769-778 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Control systems Diesel engines Permanent magnet motors Variable systems Index. décimale : 629.1 Résumé : In this paper, we investigate the control design problem associated with the use of an electrically assisted turbo-charger (TC) for a modern Diesel engine plant. It is shown that the proposed system has the potential of improving the control bandwidth of air charge regulation relative to conventional systems. The improved control authority creates the potential for precise regulation of the fresh air fraction in the air charge. A previously developed model of a Diesel engine with variable geometry turbocharging (VGT) and Exhaust Gas Recirculation (EGR) is augmented with the model of a permanent magnet synchronous motor (PMSM) to create the model of the Turbo Electrical Assist (TEA) system. The effect of exhaust gas recirculation (EGR) on the electric power requirement of the PMSM is examined over a federal test procedure (FTP) test drive cycle. Control design is performed using the sliding mode framework.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282510 [article] Control design of electrically assisted boosting systems for diesel powertrain applications [texte imprimé] / Bradley Charles Glenn, Auteur ; Devesh Upadhyay, Auteur ; Gregory N. Washington, Auteur . - 2011 . - pp. 769-778.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 769-778
Mots-clés : Control systems Diesel engines Permanent magnet motors Variable systems Index. décimale : 629.1 Résumé : In this paper, we investigate the control design problem associated with the use of an electrically assisted turbo-charger (TC) for a modern Diesel engine plant. It is shown that the proposed system has the potential of improving the control bandwidth of air charge regulation relative to conventional systems. The improved control authority creates the potential for precise regulation of the fresh air fraction in the air charge. A previously developed model of a Diesel engine with variable geometry turbocharging (VGT) and Exhaust Gas Recirculation (EGR) is augmented with the model of a permanent magnet synchronous motor (PMSM) to create the model of the Turbo Electrical Assist (TEA) system. The effect of exhaust gas recirculation (EGR) on the electric power requirement of the PMSM is examined over a federal test procedure (FTP) test drive cycle. Control design is performed using the sliding mode framework.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282510
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 779-788
Titre : A Coordinating control strategy for autothermal fuel reforming systems Type de document : texte imprimé Auteurs : Chen, Jian, Auteur ; Jing Sun, Auteur Année de publication : 2011 Article en page(s) : pp. 779-788 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Autothermal reforming Coordinating control Dynamic modeling Fuel cells Fuel reforming technologies Nonlinear systems Index. décimale : 629.1 Résumé : In this paper, a control-oriented nonlinear model is developed for an autothermal reformer-based fuel process system. By trajectory planning for one of the system states, a coordinating control algorithm is proposed for the three input flow rates to track/regulate the temperature and hydrogen production of the autothermal reformer. Stability analysis is provided to show a local uniformly ultimately bounded tracking result. Simulation results illustrate the performance of the proposed control algorithm.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5272392 [article] A Coordinating control strategy for autothermal fuel reforming systems [texte imprimé] / Chen, Jian, Auteur ; Jing Sun, Auteur . - 2011 . - pp. 779-788.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 779-788
Mots-clés : Autothermal reforming Coordinating control Dynamic modeling Fuel cells Fuel reforming technologies Nonlinear systems Index. décimale : 629.1 Résumé : In this paper, a control-oriented nonlinear model is developed for an autothermal reformer-based fuel process system. By trajectory planning for one of the system states, a coordinating control algorithm is proposed for the three input flow rates to track/regulate the temperature and hydrogen production of the autothermal reformer. Stability analysis is provided to show a local uniformly ultimately bounded tracking result. Simulation results illustrate the performance of the proposed control algorithm.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5272392
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 789-797
Titre : Boundary observer for output-feedback stabilization of thermal-fluid convection loop Type de document : texte imprimé Auteurs : Vazquez, Rafael, Auteur ; Krstic, Miroslav, Auteur Année de publication : 2011 Article en page(s) : pp. 789-797 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Backstepping Boundary control Distributed parameter systems Flow control Partial differential equations (PDEs) Observers Singularly systems Stabilization Index. décimale : 629.1 Résumé : In this paper, we consider a 2-D model of thermal fluid convection that exhibits the prototypical Rayleigh-Bernard convective instability. The fluid is enclosed between two cylinders, heated from above, and cooled from below, which makes its motion unstable for a large enough Rayleigh number. We design an stabilizing output feedback boundary control law for a realistic collocated setup, with actuation and measurements located at the outer boundary. Actuation is through rotation (direct velocity actuation) and heat flux (heating or cooling) of the outer cylinder, while measurements of friction and temperature are obtained at the same boundary. Though only a linearized version of the plant is considered in the design, an extensive closed loop simulation study of the nonlinear model shows that our design works for reasonably large initial conditions. A highly accurate approximation to the control kernels and observer output injection gains is found in closed form.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208259 [article] Boundary observer for output-feedback stabilization of thermal-fluid convection loop [texte imprimé] / Vazquez, Rafael, Auteur ; Krstic, Miroslav, Auteur . - 2011 . - pp. 789-797.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 789-797
Mots-clés : Backstepping Boundary control Distributed parameter systems Flow control Partial differential equations (PDEs) Observers Singularly systems Stabilization Index. décimale : 629.1 Résumé : In this paper, we consider a 2-D model of thermal fluid convection that exhibits the prototypical Rayleigh-Bernard convective instability. The fluid is enclosed between two cylinders, heated from above, and cooled from below, which makes its motion unstable for a large enough Rayleigh number. We design an stabilizing output feedback boundary control law for a realistic collocated setup, with actuation and measurements located at the outer boundary. Actuation is through rotation (direct velocity actuation) and heat flux (heating or cooling) of the outer cylinder, while measurements of friction and temperature are obtained at the same boundary. Though only a linearized version of the plant is considered in the design, an extensive closed loop simulation study of the nonlinear model shows that our design works for reasonably large initial conditions. A highly accurate approximation to the control kernels and observer output injection gains is found in closed form.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208259
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 798-810
Titre : Adaptive sliding mode control with perturbation estimation and PID sliding surface for motion tracking of a piezo-driven micromanipulator Type de document : texte imprimé Auteurs : Yangmin, Li., Auteur ; Qingsong Xu, Auteur Année de publication : 2011 Article en page(s) : pp. 798-810 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Flexure mechanism Hysteresis Micromanipulator Nonlinear system Piezoelectric actuation Robust control Index. décimale : 629.1 Résumé : This paper proposes an improved sliding mode control with perturbation estimation (SMCPE) featuring a PID-type sliding surface and adaptive gains for the motion tracking control of a micromanipulator system with piezoelectric actuation. One advantage of the proposed controller lies in that its implementation only requires the online estimation of perturbation and control gains without acquiring the knowledge of bounds on system uncertainties. The dynamic model of the system with Bouc-Wen hysteresis is established and identified through particle swarm optimization (PSO) approach, and the controller is designed based on Lyapunov stability analysis. A high-gain observer is adopted to estimate the full state from the only measurable position information. Experimental results demonstrate that the performance of proposed controller is superior to that of conventional SMCPE in both set-point regulation and motion tracking control. Moreover, a submicron accuracy tracking and contouring is achieved by the micromanipulator with dominant hysteresis compensated for a low magnitude level, which validates the feasibility of the proposed controller in the field of micro/nano scale manipulation as well.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282525 [article] Adaptive sliding mode control with perturbation estimation and PID sliding surface for motion tracking of a piezo-driven micromanipulator [texte imprimé] / Yangmin, Li., Auteur ; Qingsong Xu, Auteur . - 2011 . - pp. 798-810.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 798-810
Mots-clés : Flexure mechanism Hysteresis Micromanipulator Nonlinear system Piezoelectric actuation Robust control Index. décimale : 629.1 Résumé : This paper proposes an improved sliding mode control with perturbation estimation (SMCPE) featuring a PID-type sliding surface and adaptive gains for the motion tracking control of a micromanipulator system with piezoelectric actuation. One advantage of the proposed controller lies in that its implementation only requires the online estimation of perturbation and control gains without acquiring the knowledge of bounds on system uncertainties. The dynamic model of the system with Bouc-Wen hysteresis is established and identified through particle swarm optimization (PSO) approach, and the controller is designed based on Lyapunov stability analysis. A high-gain observer is adopted to estimate the full state from the only measurable position information. Experimental results demonstrate that the performance of proposed controller is superior to that of conventional SMCPE in both set-point regulation and motion tracking control. Moreover, a submicron accuracy tracking and contouring is achieved by the micromanipulator with dominant hysteresis compensated for a low magnitude level, which validates the feasibility of the proposed controller in the field of micro/nano scale manipulation as well.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282525
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 811-821
Titre : Nonlinear model predictive control of high purity distillation columns for cryogenic air separation Type de document : texte imprimé Auteurs : Zhongzhou Chen, Auteur ; Michael A. Henson, Auteur ; Paul Belanger, Auteur Année de publication : 2011 Article en page(s) : pp. 811-821 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Nonlinear model predictive control (NMPC) Process control Real time optimization Reduced-order modeling Index. décimale : 629.1 Résumé : High purity distillation columns are critical unit operations in cryogenic air separation plants that supply purified gases to a number of industries. We have developed a nonlinear model predictive control (NMPC) strategy based on the assumption of full-state feedback for a prototypical cryogenic distillation column to allow effective operation over a wide range of plant production rates. The controller design was based on a reduced-order compartmental model derived from detailed mass and energy balances by exploiting time-scale separations. Temporal discretization of the compartmental model produced a very large set of nonlinear differential and algebraic equations with advantageous sparsity properties, enabling online solution of the NMPC problem. The synergistic combination of several real-time implementation techniques were found to be essential for further reducing computation time and allowing reliable solution within the 2-min controller sampling interval. Closed-loop simulation studies demonstrated the performance advantages of NMPC compared to linear model predictive control technology currently used in the air separation industry.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5288540 [article] Nonlinear model predictive control of high purity distillation columns for cryogenic air separation [texte imprimé] / Zhongzhou Chen, Auteur ; Michael A. Henson, Auteur ; Paul Belanger, Auteur . - 2011 . - pp. 811-821.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 811-821
Mots-clés : Nonlinear model predictive control (NMPC) Process control Real time optimization Reduced-order modeling Index. décimale : 629.1 Résumé : High purity distillation columns are critical unit operations in cryogenic air separation plants that supply purified gases to a number of industries. We have developed a nonlinear model predictive control (NMPC) strategy based on the assumption of full-state feedback for a prototypical cryogenic distillation column to allow effective operation over a wide range of plant production rates. The controller design was based on a reduced-order compartmental model derived from detailed mass and energy balances by exploiting time-scale separations. Temporal discretization of the compartmental model produced a very large set of nonlinear differential and algebraic equations with advantageous sparsity properties, enabling online solution of the NMPC problem. The synergistic combination of several real-time implementation techniques were found to be essential for further reducing computation time and allowing reliable solution within the 2-min controller sampling interval. Closed-loop simulation studies demonstrated the performance advantages of NMPC compared to linear model predictive control technology currently used in the air separation industry.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5288540
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 811-821
Titre : Nonlinear model predictive control of high purity distillation columns for cryogenic air separation Type de document : texte imprimé Auteurs : Zhongzhou Chen, Auteur ; Michael A. Henson, Auteur ; Paul Belanger, Auteur Année de publication : 2011 Article en page(s) : pp. 811-821 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Nonlinear model predictive control (NMPC) Process control Real time optimization Reduced-order modeling Index. décimale : 629.1 Résumé : High purity distillation columns are critical unit operations in cryogenic air separation plants that supply purified gases to a number of industries. We have developed a nonlinear model predictive control (NMPC) strategy based on the assumption of full-state feedback for a prototypical cryogenic distillation column to allow effective operation over a wide range of plant production rates. The controller design was based on a reduced-order compartmental model derived from detailed mass and energy balances by exploiting time-scale separations. Temporal discretization of the compartmental model produced a very large set of nonlinear differential and algebraic equations with advantageous sparsity properties, enabling online solution of the NMPC problem. The synergistic combination of several real-time implementation techniques were found to be essential for further reducing computation time and allowing reliable solution within the 2-min controller sampling interval. Closed-loop simulation studies demonstrated the performance advantages of NMPC compared to linear model predictive control technology currently used in the air separation industry.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5288540 [article] Nonlinear model predictive control of high purity distillation columns for cryogenic air separation [texte imprimé] / Zhongzhou Chen, Auteur ; Michael A. Henson, Auteur ; Paul Belanger, Auteur . - 2011 . - pp. 811-821.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 811-821
Mots-clés : Nonlinear model predictive control (NMPC) Process control Real time optimization Reduced-order modeling Index. décimale : 629.1 Résumé : High purity distillation columns are critical unit operations in cryogenic air separation plants that supply purified gases to a number of industries. We have developed a nonlinear model predictive control (NMPC) strategy based on the assumption of full-state feedback for a prototypical cryogenic distillation column to allow effective operation over a wide range of plant production rates. The controller design was based on a reduced-order compartmental model derived from detailed mass and energy balances by exploiting time-scale separations. Temporal discretization of the compartmental model produced a very large set of nonlinear differential and algebraic equations with advantageous sparsity properties, enabling online solution of the NMPC problem. The synergistic combination of several real-time implementation techniques were found to be essential for further reducing computation time and allowing reliable solution within the 2-min controller sampling interval. Closed-loop simulation studies demonstrated the performance advantages of NMPC compared to linear model predictive control technology currently used in the air separation industry.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5288540
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 822-836
Titre : Adaptive algorithms for the rejection of sinusoidal disturbances acting on unknown plants Type de document : texte imprimé Auteurs : Scott Pigg, Auteur ; Marc Bodson, Auteur Année de publication : 2011 Article en page(s) : pp. 822-836 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive systems Disturbance rejection Parameter estimation Periodic signals Harmonic steady-state (HSS) Index. décimale : 629.1 Résumé : The rejection of periodic disturbances is a problem frequently encountered in control engineering, and in active noise and vibration control in particular. The paper presents a new adaptive algorithm for situations where the plant is unknown and may be time-varying. The approach consists in obtaining online estimates of the plant frequency response and of the disturbance parameters. The estimates are used to continuously update control parameters and cancel or minimize the effect of the disturbance. The dynamic behavior of the algorithm is analyzed using averaging theory. Averaging theory is used to approximate the nonlinear time-varying closed-loop system by a nonlinear time-invariant system. It is shown that the four-dimensional averaged system has a two-dimensional equilibrium surface, which can be divided into stable and unstable subsets. Trajectories generally converge to a stable point of the equilibrium surface, implying that the disturbance is asymptotically canceled even if the true parameters of the system are not exactly determined. Simulations, as well as extensive experiments on an active noise control testbed, illustrate the results of the analysis and demonstrate the ability of the algorithm to recover from abrupt system changes or track slowly-varying parameters. Extensions of the algorithm to systems with multiple inputs/outputs and disturbances consisting of multiple frequency components are provided.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286237 [article] Adaptive algorithms for the rejection of sinusoidal disturbances acting on unknown plants [texte imprimé] / Scott Pigg, Auteur ; Marc Bodson, Auteur . - 2011 . - pp. 822-836.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 822-836
Mots-clés : Adaptive systems Disturbance rejection Parameter estimation Periodic signals Harmonic steady-state (HSS) Index. décimale : 629.1 Résumé : The rejection of periodic disturbances is a problem frequently encountered in control engineering, and in active noise and vibration control in particular. The paper presents a new adaptive algorithm for situations where the plant is unknown and may be time-varying. The approach consists in obtaining online estimates of the plant frequency response and of the disturbance parameters. The estimates are used to continuously update control parameters and cancel or minimize the effect of the disturbance. The dynamic behavior of the algorithm is analyzed using averaging theory. Averaging theory is used to approximate the nonlinear time-varying closed-loop system by a nonlinear time-invariant system. It is shown that the four-dimensional averaged system has a two-dimensional equilibrium surface, which can be divided into stable and unstable subsets. Trajectories generally converge to a stable point of the equilibrium surface, implying that the disturbance is asymptotically canceled even if the true parameters of the system are not exactly determined. Simulations, as well as extensive experiments on an active noise control testbed, illustrate the results of the analysis and demonstrate the ability of the algorithm to recover from abrupt system changes or track slowly-varying parameters. Extensions of the algorithm to systems with multiple inputs/outputs and disturbances consisting of multiple frequency components are provided.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286237
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 837-849
Titre : Torque-assist hybrid electric powertrain sizing: from optimal control towards a sizing law Type de document : texte imprimé Auteurs : Olle Sundstrom, Auteur ; Lino Guzzella, Auteur ; Patrik Soltic, Auteur Année de publication : 2011 Article en page(s) : pp. 837-849 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Fuel optimal Optimization methods Road vehicle propulsion Index. décimale : 629.1 Résumé : In this study a novel method is proposed with which the optimal hybridization ratio of a torque-assist hybrid electric powertrain can be found with very little computational effort. The objective is to minimize the total CO2 emissions of the vehicle, while maintaining its drivability at a constant level. The starting point is an analysis in which the optimal driving strategy is found for eight typical driving cycles using dynamic programming. Analyzing these results, a simple yet powerful rule-based method is proposed that allows to choose the sizes of the combustion engine and of the electric motor such that the CO2 emissions are very close to the minimum value, i.e., with a deviation of less than 1% for most driving cycles.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282521 [article] Torque-assist hybrid electric powertrain sizing: from optimal control towards a sizing law [texte imprimé] / Olle Sundstrom, Auteur ; Lino Guzzella, Auteur ; Patrik Soltic, Auteur . - 2011 . - pp. 837-849.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 837-849
Mots-clés : Fuel optimal Optimization methods Road vehicle propulsion Index. décimale : 629.1 Résumé : In this study a novel method is proposed with which the optimal hybridization ratio of a torque-assist hybrid electric powertrain can be found with very little computational effort. The objective is to minimize the total CO2 emissions of the vehicle, while maintaining its drivability at a constant level. The starting point is an analysis in which the optimal driving strategy is found for eight typical driving cycles using dynamic programming. Analyzing these results, a simple yet powerful rule-based method is proposed that allows to choose the sizes of the combustion engine and of the electric motor such that the CO2 emissions are very close to the minimum value, i.e., with a deviation of less than 1% for most driving cycles.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282521
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 850-858
Titre : Analytic modal analyses of a partially strengthened Timoshenko beam Type de document : texte imprimé Auteurs : Mehrdad R. Kermani, Auteur Année de publication : 2011 Article en page(s) : pp. 850-858 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Flexible structure Large-scale structure Partial differential equation Piezoelectric stack State-space model Timoshenko beam Index. décimale : 629.1 Résumé : In this paper, the effect of an actuator on the natural frequencies and mode shapes of a cantilever Timoshenko beam is studied. In this regard, the equations of motion of a cantilever Timoshenko beam are considered. In order to incorporate the effect of the actuator in these equations, it is assumed that the beam is comprised of three uniform Timoshenko beams connected to one another at their boundaries. The continuity and equilibrium conditions are then utilized to find the sub-boundary conditions for each sub-beam. The effect of the actuator is considered as an external torque on the sub-boundary conditions. This leads to a set of partial differential equations for each sub-beam with coupled non-homogenous boundary conditions. A solution for the resulting equations is obtained and a state-space model of the beam strengthened with the actuator is derived. To evaluate the accuracy of the model, simulation and experimental results are presented.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286227 [article] Analytic modal analyses of a partially strengthened Timoshenko beam [texte imprimé] / Mehrdad R. Kermani, Auteur . - 2011 . - pp. 850-858.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 850-858
Mots-clés : Flexible structure Large-scale structure Partial differential equation Piezoelectric stack State-space model Timoshenko beam Index. décimale : 629.1 Résumé : In this paper, the effect of an actuator on the natural frequencies and mode shapes of a cantilever Timoshenko beam is studied. In this regard, the equations of motion of a cantilever Timoshenko beam are considered. In order to incorporate the effect of the actuator in these equations, it is assumed that the beam is comprised of three uniform Timoshenko beams connected to one another at their boundaries. The continuity and equilibrium conditions are then utilized to find the sub-boundary conditions for each sub-beam. The effect of the actuator is considered as an external torque on the sub-boundary conditions. This leads to a set of partial differential equations for each sub-beam with coupled non-homogenous boundary conditions. A solution for the resulting equations is obtained and a state-space model of the beam strengthened with the actuator is derived. To evaluate the accuracy of the model, simulation and experimental results are presented.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286227
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 859-870
Titre : Active suspension control with direct-drive tubular linear brushless permanent-magnet motor Type de document : texte imprimé Auteurs : Seungho Lee, Auteur ; Kim, Won-Jong, Auteur Année de publication : 2011 Article en page(s) : pp. 859-870 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Asymmetric membership function Fuzzy control Lead-larg control LQ servo Quarter car Tubular linear actuator Index. décimale : 629.1 Résumé : Recently, active suspension is gaining popularity in commercial automobiles. To develop the control methodologies for active suspension control, a quarter-car test bed was built employing a direct-drive tubular linear brushless permanent-magnet motor (LBPMM) as a force-generating component. Two accelerometers and a linear variable differential transformer (LVDT) are used in this quarter-car test bed. Three pulse-width-modulation (PWM) amplifiers supply the currents in three phases. Simulated road disturbance is generated by a rotating cam. Modified lead-lag control, linear-quadratic (LQ) servo control with a Kalman filter, fuzzy control methodologies were implemented for active-suspension control. In the case of fuzzy control, an asymmetric membership function was introduced to eliminate the DC offset in sensor data and to reduce the discrepancy in the models. This controller could attenuate road disturbance by up to 77% in the sprung mass velocity and 69% in acceleration. The velocity and the acceleration data of the sprung mass are presented to compare the controllers' performance in the ride comfort of a vehicle. Both simulation and experimental results are presented to demonstrate the effectiveness of these control methodologies.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286231 [article] Active suspension control with direct-drive tubular linear brushless permanent-magnet motor [texte imprimé] / Seungho Lee, Auteur ; Kim, Won-Jong, Auteur . - 2011 . - pp. 859-870.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 859-870
Mots-clés : Asymmetric membership function Fuzzy control Lead-larg control LQ servo Quarter car Tubular linear actuator Index. décimale : 629.1 Résumé : Recently, active suspension is gaining popularity in commercial automobiles. To develop the control methodologies for active suspension control, a quarter-car test bed was built employing a direct-drive tubular linear brushless permanent-magnet motor (LBPMM) as a force-generating component. Two accelerometers and a linear variable differential transformer (LVDT) are used in this quarter-car test bed. Three pulse-width-modulation (PWM) amplifiers supply the currents in three phases. Simulated road disturbance is generated by a rotating cam. Modified lead-lag control, linear-quadratic (LQ) servo control with a Kalman filter, fuzzy control methodologies were implemented for active-suspension control. In the case of fuzzy control, an asymmetric membership function was introduced to eliminate the DC offset in sensor data and to reduce the discrepancy in the models. This controller could attenuate road disturbance by up to 77% in the sprung mass velocity and 69% in acceleration. The velocity and the acceleration data of the sprung mass are presented to compare the controllers' performance in the ride comfort of a vehicle. Both simulation and experimental results are presented to demonstrate the effectiveness of these control methodologies.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286231
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 871-884
Titre : Nonlinear energy-based control method for aircraft automatic landing systems Type de document : texte imprimé Auteurs : Rini Akmeliawati, Auteur ; Iven M. Y. Mareels, Auteur Année de publication : 2011 Article en page(s) : pp. 871-884 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Autopilot Dissipative & energy-based design Lyapunov stability Nonlinear system Trajectory tracking Index. décimale : 629.1 Résumé : In this paper we present an aircraft automatic landing system using the nonlinear energy-based control method (NEM). This technique is based on aircraft energy management. NEM is based on the passivity-based control technique (PBC) and similar to Total Energy Control Systems (TECS). A physical interpretation of the NEM controller for the system is presented. We demonstrate that NEM provides insight into aircraft modeling and control while it achieves a satisfactory automatic flight control system (AFCS). The aircraft dynamics are presented via the energy functions. By modifying these functions, stabilization and tracking can be achieved. The automatic landing system is designed for a twin-engine civil aircraft, developed by the Group for Aeronautical Research and Technology in Europe (GARTEUR). Singular perturbation ideas are used to deal with the separation of the short-period and the phugoid dynamics. The proposed control laws appear to behave well even under extreme flight conditions.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286235 [article] Nonlinear energy-based control method for aircraft automatic landing systems [texte imprimé] / Rini Akmeliawati, Auteur ; Iven M. Y. Mareels, Auteur . - 2011 . - pp. 871-884.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 871-884
Mots-clés : Autopilot Dissipative & energy-based design Lyapunov stability Nonlinear system Trajectory tracking Index. décimale : 629.1 Résumé : In this paper we present an aircraft automatic landing system using the nonlinear energy-based control method (NEM). This technique is based on aircraft energy management. NEM is based on the passivity-based control technique (PBC) and similar to Total Energy Control Systems (TECS). A physical interpretation of the NEM controller for the system is presented. We demonstrate that NEM provides insight into aircraft modeling and control while it achieves a satisfactory automatic flight control system (AFCS). The aircraft dynamics are presented via the energy functions. By modifying these functions, stabilization and tracking can be achieved. The automatic landing system is designed for a twin-engine civil aircraft, developed by the Group for Aeronautical Research and Technology in Europe (GARTEUR). Singular perturbation ideas are used to deal with the separation of the short-period and the phugoid dynamics. The proposed control laws appear to behave well even under extreme flight conditions.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286235
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 885-895
Titre : Adaptive regulation in switched bimodal systems : an experimental evaluation Type de document : texte imprimé Auteurs : Zhizheng Wu, Auteur ; Foued Ben Amara, Auteur Année de publication : 2011 Article en page(s) : pp. 885-895 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive output regulation Bimodal systems Contact vibrations Flexible beam Q parameterization Switched systems Index. décimale : 629.1 Résumé : This paper presents experimental results on the adaptive exact output regulation in a switched bimodal mechanical system subject to unknown sinusoidal exogenous inputs representing reference or disturbance signals. The adaptive regulator design exploits the Q parameterization of regulators for the switched system, and where the Q parameter is tuned online to yield the desired regulator. The proposed adaptive regulator is evaluated on an experimental setup motivated by the flying height regulation problem in hard disk drives. In the experimental setup, the tip of a flexible beam is supposed to maintain a constant separation with respect to a surface with an unknown profile, while also being subject to an unknown disturbance force. The system exhibits a switching behaviour depending on whether contact takes place between the surface to be tracked and the tip of the beam. The experimental results successfully demonstrate the effectiveness of the proposed approach in achieving exact output regulation against unknown sinusoidal exogenous inputs and in the presence of switching in the system dynamics.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5288546 [article] Adaptive regulation in switched bimodal systems : an experimental evaluation [texte imprimé] / Zhizheng Wu, Auteur ; Foued Ben Amara, Auteur . - 2011 . - pp. 885-895.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 885-895
Mots-clés : Adaptive output regulation Bimodal systems Contact vibrations Flexible beam Q parameterization Switched systems Index. décimale : 629.1 Résumé : This paper presents experimental results on the adaptive exact output regulation in a switched bimodal mechanical system subject to unknown sinusoidal exogenous inputs representing reference or disturbance signals. The adaptive regulator design exploits the Q parameterization of regulators for the switched system, and where the Q parameter is tuned online to yield the desired regulator. The proposed adaptive regulator is evaluated on an experimental setup motivated by the flying height regulation problem in hard disk drives. In the experimental setup, the tip of a flexible beam is supposed to maintain a constant separation with respect to a surface with an unknown profile, while also being subject to an unknown disturbance force. The system exhibits a switching behaviour depending on whether contact takes place between the surface to be tracked and the tip of the beam. The experimental results successfully demonstrate the effectiveness of the proposed approach in achieving exact output regulation against unknown sinusoidal exogenous inputs and in the presence of switching in the system dynamics.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5288546
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 896-907
Titre : Estimation of tire slip angle and friction limits using steering torque Type de document : texte imprimé Auteurs : Yung-Hsiang Judy Hsu, Auteur ; Shad M. Laws, Auteur ; Gerdes, J. Christian, Auteur Année de publication : 2011 Article en page(s) : pp. 896-907 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Aligning moment Friction Pneumatic trail Sideslip Slip angle Steering torque Tire properties Index. décimale : 629.1 Résumé : Knowledge of the vehicle's lateral handling limits is important for vehicle control systems which aim to enhance vehicle handling and passenger safety. This paper presents a model-based estimation method that utilizes pneumatic trail information in steering torque to identify a vehicle's lateral handling limits, which are defined by the tire slip angle and peak lateral force limits. This method uses measurements available on many current production vehicles. Most importantly, it takes advantage of the early friction information encoded in the tire pneumatic trail. Pneumatic trail decreases as a function of the tire parameters even in the linear handling region, enabling early detection of the limits before they are reached. Experimental results on an independent front steering steer-by-wire research vehicle demonstrate the observer's ability to provide accurate real-time estimates of tire slip angle up to the limits of handling. Testing conditions include maneuvers performed on dry, flat paved road, as well as on lower-friction, dry gravel.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286226 [article] Estimation of tire slip angle and friction limits using steering torque [texte imprimé] / Yung-Hsiang Judy Hsu, Auteur ; Shad M. Laws, Auteur ; Gerdes, J. Christian, Auteur . - 2011 . - pp. 896-907.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 896-907
Mots-clés : Aligning moment Friction Pneumatic trail Sideslip Slip angle Steering torque Tire properties Index. décimale : 629.1 Résumé : Knowledge of the vehicle's lateral handling limits is important for vehicle control systems which aim to enhance vehicle handling and passenger safety. This paper presents a model-based estimation method that utilizes pneumatic trail information in steering torque to identify a vehicle's lateral handling limits, which are defined by the tire slip angle and peak lateral force limits. This method uses measurements available on many current production vehicles. Most importantly, it takes advantage of the early friction information encoded in the tire pneumatic trail. Pneumatic trail decreases as a function of the tire parameters even in the linear handling region, enabling early detection of the limits before they are reached. Experimental results on an independent front steering steer-by-wire research vehicle demonstrate the observer's ability to provide accurate real-time estimates of tire slip angle up to the limits of handling. Testing conditions include maneuvers performed on dry, flat paved road, as well as on lower-friction, dry gravel.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286226
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 908-917
Titre : Robust steering control of hot strip mill Type de document : texte imprimé Auteurs : Ivan Malloci, Auteur ; Jamal Daafouz, Auteur ; Claude Iung, Auteur Année de publication : 2011 Article en page(s) : pp. 908-917 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Hot strip mill Polytopic uncertainties Robustness Singular perturbation Steering control Index. décimale : 629.1 Résumé : In this paper, a robust steering control is proposed as a means to guarantee the stability of a hot strip finishing mill and improve its performances. The aim of the rolling process is to obtain a metal strip which is uniform and at the desired thickness. The lateral movement of the strip may reduce the quality of the product and damage the rolls. Hence, this displacement must be limited to improve process reliability. Since a hot strip mill treats products with very heterogeneous characteristics, a significant database was created and divided into different families of products. A method for reducing the numerical complexity of the problem exploiting the relation between the different product parameters is also presented. This method yields a convex stabilisation problem. Hence, for each family, a different robust controller is designed. Simulation and experimental results concerning the ArcelorMittal hot strip mill of Eisenhüttenstadt are presented.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5325654 [article] Robust steering control of hot strip mill [texte imprimé] / Ivan Malloci, Auteur ; Jamal Daafouz, Auteur ; Claude Iung, Auteur . - 2011 . - pp. 908-917.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 908-917
Mots-clés : Hot strip mill Polytopic uncertainties Robustness Singular perturbation Steering control Index. décimale : 629.1 Résumé : In this paper, a robust steering control is proposed as a means to guarantee the stability of a hot strip finishing mill and improve its performances. The aim of the rolling process is to obtain a metal strip which is uniform and at the desired thickness. The lateral movement of the strip may reduce the quality of the product and damage the rolls. Hence, this displacement must be limited to improve process reliability. Since a hot strip mill treats products with very heterogeneous characteristics, a significant database was created and divided into different families of products. A method for reducing the numerical complexity of the problem exploiting the relation between the different product parameters is also presented. This method yields a convex stabilisation problem. Hence, for each family, a different robust controller is designed. Simulation and experimental results concerning the ArcelorMittal hot strip mill of Eisenhüttenstadt are presented.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5325654
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 918-926
Titre : Compensation of VCM actuator pivot friction based on an operator modeling method Type de document : texte imprimé Auteurs : Chunling Du, Auteur ; Lihua Xie, Auteur ; Zhang, Jingliang, Auteur Année de publication : 2011 Article en page(s) : pp. 918-926 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Friction modeling and compensation Hard disk drives (HDDs) Hysteresis Prandlt operator Sensitivity function Index. décimale : 629.1 Résumé : The pivot friction of voice-coil-motor (VCM) actuator is measured for a 1.8-in small disk drive with disk rotating and slider flying. The measurement is carried out under the conditions that the actuator is controlled and the head movement amplitude is growing by changing the references. The hysteresis of friction versus head position is then obtained. An operator-based modeling approach is adopted for the hysteresis, and an optimal model is obtained by minimizing the energy gain between the head position and the modeling error. It is also found that the frequency response of the actuator model with the inclusion of the hyteresis model matches well with the measured frequency response of the actuator. A friction compensation method based on the nonlinear hysteresis model is thus proposed. The simulation and implementation results demonstrate a significant improvement in disturbance rejection at low frequencies.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5238637 [article] Compensation of VCM actuator pivot friction based on an operator modeling method [texte imprimé] / Chunling Du, Auteur ; Lihua Xie, Auteur ; Zhang, Jingliang, Auteur . - 2011 . - pp. 918-926.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 918-926
Mots-clés : Friction modeling and compensation Hard disk drives (HDDs) Hysteresis Prandlt operator Sensitivity function Index. décimale : 629.1 Résumé : The pivot friction of voice-coil-motor (VCM) actuator is measured for a 1.8-in small disk drive with disk rotating and slider flying. The measurement is carried out under the conditions that the actuator is controlled and the head movement amplitude is growing by changing the references. The hysteresis of friction versus head position is then obtained. An operator-based modeling approach is adopted for the hysteresis, and an optimal model is obtained by minimizing the energy gain between the head position and the modeling error. It is also found that the frequency response of the actuator model with the inclusion of the hyteresis model matches well with the measured frequency response of the actuator. A friction compensation method based on the nonlinear hysteresis model is thus proposed. The simulation and implementation results demonstrate a significant improvement in disturbance rejection at low frequencies.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5238637
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 927-934
Titre : Nonlinear identification of laser welding process Type de document : texte imprimé Auteurs : Xiaodong Na, Auteur ; YuMing Zhang, Auteur ; YuSheng Liu, Auteur Année de publication : 2011 Article en page(s) : pp. 927-934 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Hammerstein Identification Laser Model Non-linear Welding Index. décimale : 629.1 Résumé : It has been well recognized that weld pool geometry plays a critical role in fusion welding process such as laser welding. In this study, the authors establish a standard diode laser welding system and perform a series of experiments to investigate correlations between welding parameters and the weld pool geometry. Custom digital camera for image acquisition and software for image processing are implemented in the system to obtain the surface width of the weld pool. Experimental data has demonstrated significant nonlinearity in the diode laser welding process. The authors thus propose a continuous Hammerstein identification methodology to approximate this process. A single-input-single-output (SISO) nonlinear continuous model is then identified and validated for the diode laser welding process using the experimental data. Because by nature laser welding is a heat transferring process in which the heat applied to a unit length of the work-piece along the weld seam is inversely proportional to the travelling speed, the model takes the reciprocal of welding speed as the input and the top surface width as the output. For this methodology, all experiments need to be dynamic and be conducted using either Step or PRTS (pseudo-random ternary signal) inputs. In a revised and simplified version, the linear dynamics is identified first from a single dynamic experiment and then used in the identification of the nonlinearity with other static response experiments. The validation proves both identification methods are capable of predicting the surface width of the weld pool.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208260 [article] Nonlinear identification of laser welding process [texte imprimé] / Xiaodong Na, Auteur ; YuMing Zhang, Auteur ; YuSheng Liu, Auteur . - 2011 . - pp. 927-934.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 927-934
Mots-clés : Hammerstein Identification Laser Model Non-linear Welding Index. décimale : 629.1 Résumé : It has been well recognized that weld pool geometry plays a critical role in fusion welding process such as laser welding. In this study, the authors establish a standard diode laser welding system and perform a series of experiments to investigate correlations between welding parameters and the weld pool geometry. Custom digital camera for image acquisition and software for image processing are implemented in the system to obtain the surface width of the weld pool. Experimental data has demonstrated significant nonlinearity in the diode laser welding process. The authors thus propose a continuous Hammerstein identification methodology to approximate this process. A single-input-single-output (SISO) nonlinear continuous model is then identified and validated for the diode laser welding process using the experimental data. Because by nature laser welding is a heat transferring process in which the heat applied to a unit length of the work-piece along the weld seam is inversely proportional to the travelling speed, the model takes the reciprocal of welding speed as the input and the top surface width as the output. For this methodology, all experiments need to be dynamic and be conducted using either Step or PRTS (pseudo-random ternary signal) inputs. In a revised and simplified version, the linear dynamics is identified first from a single dynamic experiment and then used in the identification of the nonlinearity with other static response experiments. The validation proves both identification methods are capable of predicting the surface width of the weld pool.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208260
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 935-943
Titre : Data-driven feedforward control for electroporation mediated gene delivery in gene therapy Type de document : texte imprimé Auteurs : Ruoting Yang, Auteur ; Tzyh-Jong Tarn, Auteur ; Mingjun Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 935-943 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Data-driven Electroporation Feedforward Gene delivery Gene therapy Index. décimale : 629.1 Résumé : This brief proposes a novel data-driven feedforward control mechanism to regulate micro/nanoscale systems subject to insufficient measurements. The theoretical framework integrates data-driven planning and formulates a feedforward controller, which is successfully applied to an electroporation mediated gene delivery problem in gene therapy. Nonlinear dynamics modeling and analysis of the biological cell electroporation process, especially hysteresis and nonlinear jump phenomenon, are discussed. Simulation results demonstrate that the proposed control outperforms existing methods in the open literature.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286233 [article] Data-driven feedforward control for electroporation mediated gene delivery in gene therapy [texte imprimé] / Ruoting Yang, Auteur ; Tzyh-Jong Tarn, Auteur ; Mingjun Zhang, Auteur . - 2011 . - pp. 935-943.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 935-943
Mots-clés : Data-driven Electroporation Feedforward Gene delivery Gene therapy Index. décimale : 629.1 Résumé : This brief proposes a novel data-driven feedforward control mechanism to regulate micro/nanoscale systems subject to insufficient measurements. The theoretical framework integrates data-driven planning and formulates a feedforward controller, which is successfully applied to an electroporation mediated gene delivery problem in gene therapy. Nonlinear dynamics modeling and analysis of the biological cell electroporation process, especially hysteresis and nonlinear jump phenomenon, are discussed. Simulation results demonstrate that the proposed control outperforms existing methods in the open literature.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5286233
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 944-952
Titre : Trajectory tracking of a 3DOF laboratory helicopter under input and state constraints Type de document : texte imprimé Auteurs : Thomas Kiefer, Auteur ; Knut Graichen, Auteur ; Andreas Kugi, Auteur Année de publication : 2011 Article en page(s) : pp. 944-952 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Boundary value problem Feedforward control Input constraints Laboratory helicopter Nonlinear control State constraints Index. décimale : 629.1 Résumé : This brief deals with the tracking control design of a helicopter laboratory experimental setup. In order to be able to realize highly dynamic flight maneuvers, both input and state constraints have to be systematically accounted for within the control design procedure. The mathematical model being considered constitutes a nonlinear mathematical mechanical system with two control inputs and three degrees of freedom. The control concept consists of an inversion-based feedforward controller for trajectory tracking and a feedback controller for the trajectory error dynamics. The design of the feedforward controller for a point-to-point flight maneuver is traced back to the solution of a 2-point boundary value problem in the Byrnes-Isidori normal form of the mathematical model. By utilizing special saturation functions, the given constraints in the inputs and states can be systematically incorporated in the overall design process. In order to capture model uncertainties and external disturbance, an optimal state feedback controller is designed on the basis of the model linearization along the desired trajectories. The proposed control scheme is implemented in a real-time environment, and the feasibility and the excellent performance are demonstrated by means of experimental results.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282511 [article] Trajectory tracking of a 3DOF laboratory helicopter under input and state constraints [texte imprimé] / Thomas Kiefer, Auteur ; Knut Graichen, Auteur ; Andreas Kugi, Auteur . - 2011 . - pp. 944-952.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 944-952
Mots-clés : Boundary value problem Feedforward control Input constraints Laboratory helicopter Nonlinear control State constraints Index. décimale : 629.1 Résumé : This brief deals with the tracking control design of a helicopter laboratory experimental setup. In order to be able to realize highly dynamic flight maneuvers, both input and state constraints have to be systematically accounted for within the control design procedure. The mathematical model being considered constitutes a nonlinear mathematical mechanical system with two control inputs and three degrees of freedom. The control concept consists of an inversion-based feedforward controller for trajectory tracking and a feedback controller for the trajectory error dynamics. The design of the feedforward controller for a point-to-point flight maneuver is traced back to the solution of a 2-point boundary value problem in the Byrnes-Isidori normal form of the mathematical model. By utilizing special saturation functions, the given constraints in the inputs and states can be systematically incorporated in the overall design process. In order to capture model uncertainties and external disturbance, an optimal state feedback controller is designed on the basis of the model linearization along the desired trajectories. The proposed control scheme is implemented in a real-time environment, and the feasibility and the excellent performance are demonstrated by means of experimental results.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282511
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 953-961
Titre : Feedback linearization control and its application to MIMO cancer immunotherapy Type de document : texte imprimé Auteurs : Ting-Li Chien, Auteur ; Chung-Cheng Chen, Auteur ; Chiou-Jye Huang, Auteur Année de publication : 2011 Article en page(s) : pp. 953-961 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Almost distrurbance decoupling Cancer model Effector cell Feedback linearization approach Tumor cell Index. décimale : 629.1 Résumé : The study proposes a novel feedback linearization and almost disturbance decoupling control of nonlinear multiple-input-multiple-output (MIMO) systems. The goal of cancer immunotherapy is focused on eliciting an immune system response against the tumor. The study investigates a novel feedback linearization control strategy of nonlinear MIMO tumor-immune system. The main contributions of this study are to construct a control strategy such that the resulting closed-loop system is valid for any initial condition with almost disturbance decoupling performance and develop the feedback linearization design for the control of a MIMO cancer model system to improve the cancer load. The performances of drug treatment based on our proposed novel nonlinear geometric feedback control are better than some existing approaches. The numerical results derived by our method imply the tumor load to be reduced to the zero value only after more short days of drug treatment and the recurrence cycle of tumor dynamics not to be existent. All the state variables of the cancer model system can be measured using the Cellometer Auto T4 Cell Counter, programmable research micro-pump and computer with Java program in the clinical study. Electrically automatic apparatus for providing antiretroviral drugs could be constructed based on the quantification of the immune variables.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282504 [article] Feedback linearization control and its application to MIMO cancer immunotherapy [texte imprimé] / Ting-Li Chien, Auteur ; Chung-Cheng Chen, Auteur ; Chiou-Jye Huang, Auteur . - 2011 . - pp. 953-961.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 953-961
Mots-clés : Almost distrurbance decoupling Cancer model Effector cell Feedback linearization approach Tumor cell Index. décimale : 629.1 Résumé : The study proposes a novel feedback linearization and almost disturbance decoupling control of nonlinear multiple-input-multiple-output (MIMO) systems. The goal of cancer immunotherapy is focused on eliciting an immune system response against the tumor. The study investigates a novel feedback linearization control strategy of nonlinear MIMO tumor-immune system. The main contributions of this study are to construct a control strategy such that the resulting closed-loop system is valid for any initial condition with almost disturbance decoupling performance and develop the feedback linearization design for the control of a MIMO cancer model system to improve the cancer load. The performances of drug treatment based on our proposed novel nonlinear geometric feedback control are better than some existing approaches. The numerical results derived by our method imply the tumor load to be reduced to the zero value only after more short days of drug treatment and the recurrence cycle of tumor dynamics not to be existent. All the state variables of the cancer model system can be measured using the Cellometer Auto T4 Cell Counter, programmable research micro-pump and computer with Java program in the clinical study. Electrically automatic apparatus for providing antiretroviral drugs could be constructed based on the quantification of the immune variables.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282504
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 962-968
Titre : Detecting mismapping in cross-directional control systems Type de document : texte imprimé Auteurs : Andrew R. Taylor, Auteur ; Stephen R. Duncan, Auteur Année de publication : 2011 Article en page(s) : pp. 962-968 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Cross-directional (CD) control Estimation Fault detection Mapping Robustness Index. décimale : 629.1 Résumé : Cross-directional (CD) control systems regulate product properties in industrial web processes by manipulating the inputs to arrays of actuators. In many of these processes, the product wanders or undergoes transformations such as stretching that introduce lateral shifts in the location of the actuator responses. The spatial position of the center of the response of each actuator is known as the actuator mapping and for CD controllers to operate effectively, it is important that this is known accurately. Actuator mapping is one of the main sources of uncertainty in the model that is used to design CD controllers and mismapping can lead to closed-loop instability, so CD controllers are often designed conservatively to provide robustness to this uncertainty. Because CD controllers can operate with a significant level of mismapping, both the dynamic and steady-state responses of the closed-loop system are often degraded. In practice, it is difficult to detect the presence of mismapping, but this brief describes an online diagnostic technique based on a vector auto regression (VAR) representation of the closed-loop response of the actuator inputs, which derives a statistic from existing plant data that can be used in a hypothesis test to detect the presence of mismapping. The performance of the technique is demonstrated by results from an implementation on a plastic film process.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282526 [article] Detecting mismapping in cross-directional control systems [texte imprimé] / Andrew R. Taylor, Auteur ; Stephen R. Duncan, Auteur . - 2011 . - pp. 962-968.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 962-968
Mots-clés : Cross-directional (CD) control Estimation Fault detection Mapping Robustness Index. décimale : 629.1 Résumé : Cross-directional (CD) control systems regulate product properties in industrial web processes by manipulating the inputs to arrays of actuators. In many of these processes, the product wanders or undergoes transformations such as stretching that introduce lateral shifts in the location of the actuator responses. The spatial position of the center of the response of each actuator is known as the actuator mapping and for CD controllers to operate effectively, it is important that this is known accurately. Actuator mapping is one of the main sources of uncertainty in the model that is used to design CD controllers and mismapping can lead to closed-loop instability, so CD controllers are often designed conservatively to provide robustness to this uncertainty. Because CD controllers can operate with a significant level of mismapping, both the dynamic and steady-state responses of the closed-loop system are often degraded. In practice, it is difficult to detect the presence of mismapping, but this brief describes an online diagnostic technique based on a vector auto regression (VAR) representation of the closed-loop response of the actuator inputs, which derives a statistic from existing plant data that can be used in a hypothesis test to detect the presence of mismapping. The performance of the technique is demonstrated by results from an implementation on a plastic film process.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282526
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 969-975
Titre : Unified H infty control to suppress vertices of plant input and output sensitivity functions Type de document : texte imprimé Auteurs : Sang Min Suh, Auteur Année de publication : 2011 Article en page(s) : pp. 969-975 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Hard disk drives H infty control Kalman inequality Linear matrix inequalities (LKIs) Loop shaping Nyquist plot Stability Sensitivity peak Index. décimale : 629.1 Résumé : This note presents a discrete-time H∞ controller to attenuate effects of external disturbances introduced from both plant input and plant output. In this note, two stage control structure is constructed so that state variable dependent conventional controllers and H∞ loop shaping controllers are simultaneously utilized, which is a different approach from previous methods. For the loop shaping controller, a new weighting function derived from an open loop transfer function of fictitious state-feedback systems is proposed. Since the weighting function inherits implicit stability margins, sufficiently stable closed loop systems are designed, therefore well damped transient responses are achieved.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282508 [article] Unified H infty control to suppress vertices of plant input and output sensitivity functions [texte imprimé] / Sang Min Suh, Auteur . - 2011 . - pp. 969-975.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 969-975
Mots-clés : Hard disk drives H infty control Kalman inequality Linear matrix inequalities (LKIs) Loop shaping Nyquist plot Stability Sensitivity peak Index. décimale : 629.1 Résumé : This note presents a discrete-time H∞ controller to attenuate effects of external disturbances introduced from both plant input and plant output. In this note, two stage control structure is constructed so that state variable dependent conventional controllers and H∞ loop shaping controllers are simultaneously utilized, which is a different approach from previous methods. For the loop shaping controller, a new weighting function derived from an open loop transfer function of fictitious state-feedback systems is proposed. Since the weighting function inherits implicit stability margins, sufficiently stable closed loop systems are designed, therefore well damped transient responses are achieved.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282508
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 976-983
Titre : Automatic shielding-shimming magnetic field compensator for excluded volume applications Type de document : texte imprimé Auteurs : Guillermo Forte, Auteur ; German Farrher, Auteur ; Luis R. Canali, Auteur Année de publication : 2011 Article en page(s) : pp. 976-983 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Active shielding Active shimming Excluded volume Fast field cycling nuclear magnetic resonance (FFC-NMR) Magnetic field compensation Multiple-input Multiple-output (MIMO) control Index. décimale : 629.1 Résumé : We discuss the problem of automatic magnetic field compensation within an excluded volume where the magnetic field cannot be sensed in a direct way. Both magnetic field spatial average (shielding) and first order orthogonal gradients (shimming) are considered. The active shielding-shimming compensator is based on a multiple-input multiple-output controller driving a specifically designed coil-set. The magnetic field and its gradients are calculated from the readings of ten hall sensors located outside the exclusion volume.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282506 [article] Automatic shielding-shimming magnetic field compensator for excluded volume applications [texte imprimé] / Guillermo Forte, Auteur ; German Farrher, Auteur ; Luis R. Canali, Auteur . - 2011 . - pp. 976-983.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 976-983
Mots-clés : Active shielding Active shimming Excluded volume Fast field cycling nuclear magnetic resonance (FFC-NMR) Magnetic field compensation Multiple-input Multiple-output (MIMO) control Index. décimale : 629.1 Résumé : We discuss the problem of automatic magnetic field compensation within an excluded volume where the magnetic field cannot be sensed in a direct way. Both magnetic field spatial average (shielding) and first order orthogonal gradients (shimming) are considered. The active shielding-shimming compensator is based on a multiple-input multiple-output controller driving a specifically designed coil-set. The magnetic field and its gradients are calculated from the readings of ten hall sensors located outside the exclusion volume.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282506
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 984-992
Titre : Bilateral teleoperation of multiple mobile agents : coordinated motion and collision avoidance Type de document : texte imprimé Auteurs : Erick J. Rodriguez-Seda, Auteur ; Janes J. Troy, Auteur ; Charles A. Erignac, Auteur Année de publication : 2011 Article en page(s) : pp. 984-992 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Distributed robot systems Formation control Networked control systems Obstacle avoidance Teleoperation Index. décimale : 629.1 Résumé : This paper presents theoretical and experimental results on bilateral teleoperation of multiple mobile slave agents coupled to a single master robot. We first design a passifying proportional-derivative (PD) controller to enforce motion tracking and formation control of master and slave vehicles under constant, bounded communication delays. Then, we incorporate avoidance functions to guarantee collision-free transit through obstructed spaces. The unified control framework is validated by experiments with two coaxial helicopters as slave agents and a haptic device as the master robot.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282509 [article] Bilateral teleoperation of multiple mobile agents : coordinated motion and collision avoidance [texte imprimé] / Erick J. Rodriguez-Seda, Auteur ; Janes J. Troy, Auteur ; Charles A. Erignac, Auteur . - 2011 . - pp. 984-992.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 984-992
Mots-clés : Distributed robot systems Formation control Networked control systems Obstacle avoidance Teleoperation Index. décimale : 629.1 Résumé : This paper presents theoretical and experimental results on bilateral teleoperation of multiple mobile slave agents coupled to a single master robot. We first design a passifying proportional-derivative (PD) controller to enforce motion tracking and formation control of master and slave vehicles under constant, bounded communication delays. Then, we incorporate avoidance functions to guarantee collision-free transit through obstructed spaces. The unified control framework is validated by experiments with two coaxial helicopters as slave agents and a haptic device as the master robot.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282509
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 993-1003
Titre : EGR-VGT control and tuning for pumping work minimization and emission control Type de document : texte imprimé Auteurs : Johan Wahlstrom, Auteur ; Lars Eriksson, Auteur ; Lars Nielsen, Auteur Année de publication : 2011 Article en page(s) : pp. 993-1003 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Diesel engine modeling Exhaust gas recirculation (EGR) fraction Engine control Oxygen/fuel ration Proportonal integral derivative (PID) Index. décimale : 629.1 Résumé : A control structure is proposed and investigated for coordinated control of exhaust gas recirculation (EGR) valve and variable geometry turbochargers (VGT) position in heavy duty diesel engines. Main control goals are to fulfill the legislated emission levels, to reduce the fuel consumption, and to fulfill safe operation of the turbocharger. These goals are achieved through regulation of normalized oxygen/fuel ratio, λO, and intake manifold EGR-fraction. These are chosen both as main performance variables and feedback variables since they contain information about when it is possible to decrease the fuel consumption by minimizing the pumping work. Based on this a novel and simple pumping work minimization strategy is developed. The proposed performance variables are also strongly coupled to the emissions which makes it easier to adjust set-points, e.g., depending on measured emissions during an emission calibration process, since it is more straightforward than control of manifold pressure and air mass flow. Further, internally the controller is structured to handle the different control objectives. Controller tuning is important for performance but can be time consuming so the controller objectives are captured in a cost function, which makes automatic tuning possible even though objectives are conflicting. Performance tradeoffs are necessary and are illustrated on the European Transient Cycle. The controller is validated in an engine test cell, where it is experimentally demonstrated that the controller achieves all the control objectives and that the current production controller has at least 26% higher pumping losses compared to the proposed controller.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282503 [article] EGR-VGT control and tuning for pumping work minimization and emission control [texte imprimé] / Johan Wahlstrom, Auteur ; Lars Eriksson, Auteur ; Lars Nielsen, Auteur . - 2011 . - pp. 993-1003.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 993-1003
Mots-clés : Diesel engine modeling Exhaust gas recirculation (EGR) fraction Engine control Oxygen/fuel ration Proportonal integral derivative (PID) Index. décimale : 629.1 Résumé : A control structure is proposed and investigated for coordinated control of exhaust gas recirculation (EGR) valve and variable geometry turbochargers (VGT) position in heavy duty diesel engines. Main control goals are to fulfill the legislated emission levels, to reduce the fuel consumption, and to fulfill safe operation of the turbocharger. These goals are achieved through regulation of normalized oxygen/fuel ratio, λO, and intake manifold EGR-fraction. These are chosen both as main performance variables and feedback variables since they contain information about when it is possible to decrease the fuel consumption by minimizing the pumping work. Based on this a novel and simple pumping work minimization strategy is developed. The proposed performance variables are also strongly coupled to the emissions which makes it easier to adjust set-points, e.g., depending on measured emissions during an emission calibration process, since it is more straightforward than control of manifold pressure and air mass flow. Further, internally the controller is structured to handle the different control objectives. Controller tuning is important for performance but can be time consuming so the controller objectives are captured in a cost function, which makes automatic tuning possible even though objectives are conflicting. Performance tradeoffs are necessary and are illustrated on the European Transient Cycle. The controller is validated in an engine test cell, where it is experimentally demonstrated that the controller achieves all the control objectives and that the current production controller has at least 26% higher pumping losses compared to the proposed controller.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282503
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