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IEEE Transactions on control systems technology |
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Ajouter le résultat dans votre panierA Robust controller interpolation design technique / Hencey, Brandon in IEEE Transactions on control systems technology, Vol. 18 N° 1 (Janvier 2010)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 1-10
Titre : A Robust controller interpolation design technique Type de document : texte imprimé Auteurs : Hencey, Brandon, Auteur ; Alleyne, Andrew G., Auteur Année de publication : 2011 Article en page(s) : pp. 1-10 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Controller interpolation Gain-scheduling H-infinity control suboptimal control Switched systems Index. décimale : 629.1 Résumé : Switching or blending among controllers is termed controller interpolation. This paper investigates a robust controller interpolation technique and applies it to an experimental test bed. Although an interpolated controller is composed of linear time-invariant (LTI) controllers stabilizing the LTI plant, closed-loop performance and stability are not guaranteed. Thus, it is of interest to design the interpolated controller to guarantee closed-loop stability and a performance level for all interpolation signals describing controller switching sequences and combinations. The performance metric that is under investigation in this paper is the H ?? norm. A suboptimal robust interpolated-controller design algorithm is framed in terms of bilinear matrix inequalities. The motivating example demonstrates the efficacy of the robust interpolated-controller design.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895694 [article] A Robust controller interpolation design technique [texte imprimé] / Hencey, Brandon, Auteur ; Alleyne, Andrew G., Auteur . - 2011 . - pp. 1-10.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 1-10
Mots-clés : Controller interpolation Gain-scheduling H-infinity control suboptimal control Switched systems Index. décimale : 629.1 Résumé : Switching or blending among controllers is termed controller interpolation. This paper investigates a robust controller interpolation technique and applies it to an experimental test bed. Although an interpolated controller is composed of linear time-invariant (LTI) controllers stabilizing the LTI plant, closed-loop performance and stability are not guaranteed. Thus, it is of interest to design the interpolated controller to guarantee closed-loop stability and a performance level for all interpolation signals describing controller switching sequences and combinations. The performance metric that is under investigation in this paper is the H ?? norm. A suboptimal robust interpolated-controller design algorithm is framed in terms of bilinear matrix inequalities. The motivating example demonstrates the efficacy of the robust interpolated-controller design.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895694
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 11-21
Titre : Real-time discrete neural block control using sliding modes for electric induction motors Type de document : texte imprimé Auteurs : Alma Y. Alanis, Auteur ; Edgar N. Sanchez, Auteur ; Loukianov, Alexander G., Auteur Année de publication : 2011 Article en page(s) : pp. 11-21 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Discrete time nonlinear systems Electric induction motor Extended Kalman filtering (EKF) learning Neural block control (NBC) Sliding modes Index. décimale : 629.1 Résumé : This paper deals with real-time adaptive tracking for discrete-time induction motors in the presence of bounded disturbances. A high-order neural-network structure is used to identify the plant model, and based on this model, a discrete-time control law is derived, which combines discrete-time block-control and sliding-mode techniques. This paper also includes the respective stability analysis for the whole system with a strategy to avoid adaptive weight zero-crossing. The scheme is implemented in real time using a three-phase induction motor.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4814535 [article] Real-time discrete neural block control using sliding modes for electric induction motors [texte imprimé] / Alma Y. Alanis, Auteur ; Edgar N. Sanchez, Auteur ; Loukianov, Alexander G., Auteur . - 2011 . - pp. 11-21.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 11-21
Mots-clés : Discrete time nonlinear systems Electric induction motor Extended Kalman filtering (EKF) learning Neural block control (NBC) Sliding modes Index. décimale : 629.1 Résumé : This paper deals with real-time adaptive tracking for discrete-time induction motors in the presence of bounded disturbances. A high-order neural-network structure is used to identify the plant model, and based on this model, a discrete-time control law is derived, which combines discrete-time block-control and sliding-mode techniques. This paper also includes the respective stability analysis for the whole system with a strategy to avoid adaptive weight zero-crossing. The scheme is implemented in real time using a three-phase induction motor.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4814535
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 22-34
Titre : System identification and contour tracking of a plane-type 3-DOF precision positioning table Type de document : texte imprimé Auteurs : Rong-Fong, Fung, Auteur ; Wang-Chi Lin, Auteur Année de publication : 2011 Article en page(s) : pp. 22-34 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive backstepping control (ABC) Cross-coupling effect Real-coded genetic algorithm (RGA) System identification 3-DOF precision positioning table Index. décimale : 629.1 Résumé : In this paper, an adaptive backstepping control (ABC) method for a plane-type 3-DOF (X,Y,θz) precision positioning table is proposed. First, according to the dynamics of a mechanical mass-spring system, we establish mathematical equations that contain linear viscous frictions and varied elasticities with cross-coupling effects due to mechanical bending. In system identification, the real-coded genetic algorithm (RGA) method is employed to find the optimized parameters, and the dynamic responses of numerical simulations and experimental results are compared. On the basis of the state-space model, the ABC is proposed to track trajectories and impose on the dynamic performance, robustness of parameter variations, and trajectory-tracking errors. The comparisons between numerical simulations and experimental results illustrate the validity of the proposed ABC method for practical applications in contour tracking and also show the performances in reducing the cross-coupling effects.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895691 [article] System identification and contour tracking of a plane-type 3-DOF precision positioning table [texte imprimé] / Rong-Fong, Fung, Auteur ; Wang-Chi Lin, Auteur . - 2011 . - pp. 22-34.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 22-34
Mots-clés : Adaptive backstepping control (ABC) Cross-coupling effect Real-coded genetic algorithm (RGA) System identification 3-DOF precision positioning table Index. décimale : 629.1 Résumé : In this paper, an adaptive backstepping control (ABC) method for a plane-type 3-DOF (X,Y,θz) precision positioning table is proposed. First, according to the dynamics of a mechanical mass-spring system, we establish mathematical equations that contain linear viscous frictions and varied elasticities with cross-coupling effects due to mechanical bending. In system identification, the real-coded genetic algorithm (RGA) method is employed to find the optimized parameters, and the dynamic responses of numerical simulations and experimental results are compared. On the basis of the state-space model, the ABC is proposed to track trajectories and impose on the dynamic performance, robustness of parameter variations, and trajectory-tracking errors. The comparisons between numerical simulations and experimental results illustrate the validity of the proposed ABC method for practical applications in contour tracking and also show the performances in reducing the cross-coupling effects.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895691
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 35-44
Titre : Optimal system design of SISO-servopneumatic positioning drives Type de document : texte imprimé Auteurs : Alexander Hildebrandt, Auteur ; Rudiger Neumann, Auteur ; Sawodny, Oliver, Auteur Année de publication : 2011 Article en page(s) : pp. 35-44 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Component sizing Exact input/output linearization Internal dynamics Nonlinear system Pneumatic drive Zerodynamics Index. décimale : 629.1 Résumé : Servopneumatic actuators are very attractive for automated handling tasks or robot operations. They have many advantages such as high speed, high robustness in rough manufacturing environment or high power-to-weight ratio. The considered actuator system is a standard configuration in pneumatics consisting of a double acting pneumatic cylinder controlled by a proportional directional control valve. For the set-up a detailed mathematical model is derived. In order to guarantee an accurate tracking behaviour, a model-based nonlinear controller is presented. Model based approaches for the control design have several advantages. Tuning of the controller can be reached in a systematic way even in the case of a large variety of different configurations. But not only the control design itself can be treated. The model offers the possibility to optimize the size of components for demanded automation tasks. In most cases, this is solved based on steady state assumptions. In this contribution, a method for a design procedure for the pneumatic actuator system based on the dynamic equation is presented. With the representation of the system, an optimization procedure for the components is introduced. The optimization criteria consist of the minimization of the air consumption and investment costs.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4815391 [article] Optimal system design of SISO-servopneumatic positioning drives [texte imprimé] / Alexander Hildebrandt, Auteur ; Rudiger Neumann, Auteur ; Sawodny, Oliver, Auteur . - 2011 . - pp. 35-44.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 35-44
Mots-clés : Component sizing Exact input/output linearization Internal dynamics Nonlinear system Pneumatic drive Zerodynamics Index. décimale : 629.1 Résumé : Servopneumatic actuators are very attractive for automated handling tasks or robot operations. They have many advantages such as high speed, high robustness in rough manufacturing environment or high power-to-weight ratio. The considered actuator system is a standard configuration in pneumatics consisting of a double acting pneumatic cylinder controlled by a proportional directional control valve. For the set-up a detailed mathematical model is derived. In order to guarantee an accurate tracking behaviour, a model-based nonlinear controller is presented. Model based approaches for the control design have several advantages. Tuning of the controller can be reached in a systematic way even in the case of a large variety of different configurations. But not only the control design itself can be treated. The model offers the possibility to optimize the size of components for demanded automation tasks. In most cases, this is solved based on steady state assumptions. In this contribution, a method for a design procedure for the pneumatic actuator system based on the dynamic equation is presented. With the representation of the system, an optimization procedure for the components is introduced. The optimization criteria consist of the minimization of the air consumption and investment costs.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4815391
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 45-65
Titre : Vector-field-orientation feedback control method for a differentially driven vehicle Type de document : texte imprimé Auteurs : Maciej Michaek, Auteur ; Krzysztof Kozowski, Auteur Année de publication : 2011 Article en page(s) : pp. 45-65 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Feedback control Mobile vehicles Nonholonomic systems Point satbilization Trajectory tracking Vector fields Index. décimale : 629.1 Résumé : This paper presents a novel vector-field-orientation (VFO) feedback control method and its application to a differentially driven wheeled vehicle. It describes the control concept and the control design methodology originating from simple geometrical interpretations connected with the vehicle model structure. The novelty of the VFO method allows one to treat two considered control tasks - trajectory tracking and point stabilization - in a unified manner. Control systems with VFO controllers reveal several practically desirable features like fast and nonoscillatory error convergence, simple interpretation of control input effect, and, as a consequence, particular simplicity of the controller parametric synthesis. The theoretical considerations included in this paper are validated by simulation and experimental results.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4908916 [article] Vector-field-orientation feedback control method for a differentially driven vehicle [texte imprimé] / Maciej Michaek, Auteur ; Krzysztof Kozowski, Auteur . - 2011 . - pp. 45-65.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 45-65
Mots-clés : Feedback control Mobile vehicles Nonholonomic systems Point satbilization Trajectory tracking Vector fields Index. décimale : 629.1 Résumé : This paper presents a novel vector-field-orientation (VFO) feedback control method and its application to a differentially driven wheeled vehicle. It describes the control concept and the control design methodology originating from simple geometrical interpretations connected with the vehicle model structure. The novelty of the VFO method allows one to treat two considered control tasks - trajectory tracking and point stabilization - in a unified manner. Control systems with VFO controllers reveal several practically desirable features like fast and nonoscillatory error convergence, simple interpretation of control input effect, and, as a consequence, particular simplicity of the controller parametric synthesis. The theoretical considerations included in this paper are validated by simulation and experimental results.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4908916
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 66-78
Titre : Scheduling-and-control codesign for a collection of networked control systems with uncertain delays Type de document : texte imprimé Auteurs : Shi-Lu Dai, Auteur ; Hai Lin, Auteur ; Ge, Shuzhi Sam, Auteur Année de publication : 2011 Article en page(s) : pp. 66-78 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Average dwell time Codesign Networked control systems (NCSs) Scheduling Switched systems Index. décimale : 629.1 Résumé : This paper is concerned with the simultaneous stabilization of a collection of continuous-time linear time-invariant (LTI) plants whose feedback-control loops are closed via a shared digital communication network. Because of the limitation of communication capacity, only a limited number of controller-plant connections can be accommodated at any time instant. Therefore, it is necessary to carefully determine a scheduling policy so as to achieve a simultaneous stabilization for all these control loops. A sufficient condition on the existence of such a scheduling policy is presented for a collection of networked LTI systems with sampled-data controllers and uncertain network-induced delays. The proof for the schedulability condition is in a constructive way, which can also serve as a systematic method to design a scheduling policy. Finally, a scheduling-and-feedback-control codesign procedure is proposed for the simultaneous stabilization of the collection of networked LTI systems, and the effectiveness of the proposed codesign procedure is demonstrated with simulation results.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4837630 [article] Scheduling-and-control codesign for a collection of networked control systems with uncertain delays [texte imprimé] / Shi-Lu Dai, Auteur ; Hai Lin, Auteur ; Ge, Shuzhi Sam, Auteur . - 2011 . - pp. 66-78.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 66-78
Mots-clés : Average dwell time Codesign Networked control systems (NCSs) Scheduling Switched systems Index. décimale : 629.1 Résumé : This paper is concerned with the simultaneous stabilization of a collection of continuous-time linear time-invariant (LTI) plants whose feedback-control loops are closed via a shared digital communication network. Because of the limitation of communication capacity, only a limited number of controller-plant connections can be accommodated at any time instant. Therefore, it is necessary to carefully determine a scheduling policy so as to achieve a simultaneous stabilization for all these control loops. A sufficient condition on the existence of such a scheduling policy is presented for a collection of networked LTI systems with sampled-data controllers and uncertain network-induced delays. The proof for the schedulability condition is in a constructive way, which can also serve as a systematic method to design a scheduling policy. Finally, a scheduling-and-feedback-control codesign procedure is proposed for the simultaneous stabilization of the collection of networked LTI systems, and the effectiveness of the proposed codesign procedure is demonstrated with simulation results.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4837630
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 79-90
Titre : A Reset state estimator using an accelerometer for enhanced motion control with sensor quantization Type de document : texte imprimé Auteurs : Jinchuan Zheng, Auteur ; Minyue Fu, Auteur Année de publication : 2011 Article en page(s) : pp. 79-90 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Disturbance observer High precision tracking control Reset state estimation Sensor quantization Index. décimale : 629.1 Résumé : Sensor quantization is a key factor that deteriorates the tracking performance of positioning systems with low-resolution optical encoders. This paper presents a method to improve the performance of such systems by merging an accelerometer of low cost. First, to reject the external disturbance, friction force and system perturbations, we design a disturbance observer (DOB) based on acceleration signals. Second, a reset kinematic state estimator (RKSE) is designed using acceleration signals to make the state estimate immune to both system perturbations and input disturbances. Third, a state feedback controller is designed based on the internal model principle (IMP) for accurate sinusoidal reference tracking. Simulations and experimental results are used to demonstrate the effectiveness of the proposed control method for tracking position reference commands and its robustness to system uncertainties.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4804671 [article] A Reset state estimator using an accelerometer for enhanced motion control with sensor quantization [texte imprimé] / Jinchuan Zheng, Auteur ; Minyue Fu, Auteur . - 2011 . - pp. 79-90.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 79-90
Mots-clés : Disturbance observer High precision tracking control Reset state estimation Sensor quantization Index. décimale : 629.1 Résumé : Sensor quantization is a key factor that deteriorates the tracking performance of positioning systems with low-resolution optical encoders. This paper presents a method to improve the performance of such systems by merging an accelerometer of low cost. First, to reject the external disturbance, friction force and system perturbations, we design a disturbance observer (DOB) based on acceleration signals. Second, a reset kinematic state estimator (RKSE) is designed using acceleration signals to make the state estimate immune to both system perturbations and input disturbances. Third, a state feedback controller is designed based on the internal model principle (IMP) for accurate sinusoidal reference tracking. Simulations and experimental results are used to demonstrate the effectiveness of the proposed control method for tracking position reference commands and its robustness to system uncertainties.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4804671
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 91-103
Titre : An extended Kalman filter for real-time estimation and control of a rigid-link flexible-joint manipulator Type de document : texte imprimé Auteurs : Chris A. Lightcap, Auteur ; Scott A. Banks, Auteur Année de publication : 2011 Article en page(s) : pp. 91-103 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive control Extended Kalman filtering (EKF) Flexible-joint manipulators Mitsubishi PA 10-6CE Index. décimale : 629.1 Résumé : Maximizing the tracking performance of an industrial manipulator requires an accurate expression of manipulator dynamics and efficient model parameterization. These objectives are difficult to achieve in manipulators with flexible joints since link positions typically are not measured. We present in this paper an extended Kalman filter (EKF) observer to estimate manipulator states and couple these estimates to an adaptive rigid-link flexible-joint (RLFJ) controller. In a computer simulation, the EKF-RLFJ controller demonstrated superior tracking performance compared to a traditional adaptive controller. Experimental results for the Mitsubishi PA10-6CE showed improvements in tracking performance using the EKF-RLFJ controller with a 5 kg end-effector payload. Even greater improvements in tracking performance may be achieved in manipulators with significant joint flexibility.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5071189 [article] An extended Kalman filter for real-time estimation and control of a rigid-link flexible-joint manipulator [texte imprimé] / Chris A. Lightcap, Auteur ; Scott A. Banks, Auteur . - 2011 . - pp. 91-103.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 91-103
Mots-clés : Adaptive control Extended Kalman filtering (EKF) Flexible-joint manipulators Mitsubishi PA 10-6CE Index. décimale : 629.1 Résumé : Maximizing the tracking performance of an industrial manipulator requires an accurate expression of manipulator dynamics and efficient model parameterization. These objectives are difficult to achieve in manipulators with flexible joints since link positions typically are not measured. We present in this paper an extended Kalman filter (EKF) observer to estimate manipulator states and couple these estimates to an adaptive rigid-link flexible-joint (RLFJ) controller. In a computer simulation, the EKF-RLFJ controller demonstrated superior tracking performance compared to a traditional adaptive controller. Experimental results for the Mitsubishi PA10-6CE showed improvements in tracking performance using the EKF-RLFJ controller with a 5 kg end-effector payload. Even greater improvements in tracking performance may be achieved in manipulators with significant joint flexibility.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5071189
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 104-117
Titre : A Two-phase heuristic for the production scheduling of heavy plates in steel industry Type de document : texte imprimé Auteurs : Lixin Tang, Auteur ; Xianpeng Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 104-117 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Decision tree-based heuristic Heavy plate Hotrolling scheduling Reheating furnace scheduling Scatter search Index. décimale : 629.1 Résumé : In this paper, the production scheduling of heavy plates is considered. Different from general hot rolling mill, the reheating furnace scheduling shares the same importance with the hot rolling scheduling due to the special characters of heavy plates such as the large differences in weight and dimension. One major characteristic of the reheating furnace is that it can simultaneously process multiple slabs. When the furnace is full, a slab can be drawn in only if the head slab in the furnace has been drawn out. Therefore, the practical heating time of a slab is variable and besides the weight and dimension, is also dependent on not only the slab heating sequence but also the furnace capacity. Since there is no buffer between the reheating furnace and the hot rolling line, a finished slab will reside in the furnace until the hot rolling line is available. To solve this problem, a two-phase heuristic is proposed. In the first phase, only the hot rolling scheduling problem is considered and a scatter search is developed for it. In the second phase, a decision tree-based heuristic is constructed to obtain the corresponding reheating furnace schedule. The experimental results on real production data show that the two-phase heuristic outperforms the current manual scheduling system.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5337884 [article] A Two-phase heuristic for the production scheduling of heavy plates in steel industry [texte imprimé] / Lixin Tang, Auteur ; Xianpeng Wang, Auteur . - 2011 . - pp. 104-117.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 104-117
Mots-clés : Decision tree-based heuristic Heavy plate Hotrolling scheduling Reheating furnace scheduling Scatter search Index. décimale : 629.1 Résumé : In this paper, the production scheduling of heavy plates is considered. Different from general hot rolling mill, the reheating furnace scheduling shares the same importance with the hot rolling scheduling due to the special characters of heavy plates such as the large differences in weight and dimension. One major characteristic of the reheating furnace is that it can simultaneously process multiple slabs. When the furnace is full, a slab can be drawn in only if the head slab in the furnace has been drawn out. Therefore, the practical heating time of a slab is variable and besides the weight and dimension, is also dependent on not only the slab heating sequence but also the furnace capacity. Since there is no buffer between the reheating furnace and the hot rolling line, a finished slab will reside in the furnace until the hot rolling line is available. To solve this problem, a two-phase heuristic is proposed. In the first phase, only the hot rolling scheduling problem is considered and a scatter search is developed for it. In the second phase, a decision tree-based heuristic is constructed to obtain the corresponding reheating furnace schedule. The experimental results on real production data show that the two-phase heuristic outperforms the current manual scheduling system.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5337884
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 118-127
Titre : Cut scheduling optimization in plate mill finishing area through mixed-integer linear programming Type de document : texte imprimé Auteurs : Claudio Aurora, Auteur ; Doretta Cettolo, Auteur ; Francesco Alessandro Cuzzola, Auteur Année de publication : 2011 Article en page(s) : pp. 118-127 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Automation systems Cut scheduling Mixed integer optimization Steel production Index. décimale : 629.1 Résumé : The recent development of steel technologies for plate production introduced new control and optimization issues that modern automation systems need to take into account. In this paper, the integration in an automation system of mixed-integer linear programming, which now relies on extremely efficient algorithms, and the use of new sensors for automatic detection of defects for the optimization of production and quality are presented here.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4907218 [article] Cut scheduling optimization in plate mill finishing area through mixed-integer linear programming [texte imprimé] / Claudio Aurora, Auteur ; Doretta Cettolo, Auteur ; Francesco Alessandro Cuzzola, Auteur . - 2011 . - pp. 118-127.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 118-127
Mots-clés : Automation systems Cut scheduling Mixed integer optimization Steel production Index. décimale : 629.1 Résumé : The recent development of steel technologies for plate production introduced new control and optimization issues that modern automation systems need to take into account. In this paper, the integration in an automation system of mixed-integer linear programming, which now relies on extremely efficient algorithms, and the use of new sensors for automatic detection of defects for the optimization of production and quality are presented here.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4907218
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 128-135
Titre : Adaptive homography-based visual servo tracking control via a quaternion formulation Type de document : texte imprimé Auteurs : Guoqiang Hu, Auteur ; Nicholas Gans, Auteur ; Norman Fitz-Coy, Auteur Année de publication : 2011 Article en page(s) : pp. 128-135 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive control Lyapunov methods Quaternion representation Tracking control Visual servoing Index. décimale : 629.1 Résumé : In this paper, an adaptive homography-based visual servo tracking controller is developed for the camera-in-hand problem using a quaternion formulation to represent rotation tracking error. The desired trajectory in the tracking problem is encoded by a sequence of images (e.g., a video sequence), and Lyapunov methods are employed to facilitate the control design and the stability analysis. An adaptive estimation law is designed to compensate for the lack of unknown depth information. Experimental results are provided to demonstrate the performance of the visual servo tracking controller.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895678 [article] Adaptive homography-based visual servo tracking control via a quaternion formulation [texte imprimé] / Guoqiang Hu, Auteur ; Nicholas Gans, Auteur ; Norman Fitz-Coy, Auteur . - 2011 . - pp. 128-135.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 128-135
Mots-clés : Adaptive control Lyapunov methods Quaternion representation Tracking control Visual servoing Index. décimale : 629.1 Résumé : In this paper, an adaptive homography-based visual servo tracking controller is developed for the camera-in-hand problem using a quaternion formulation to represent rotation tracking error. The desired trajectory in the tracking problem is encoded by a sequence of images (e.g., a video sequence), and Lyapunov methods are employed to facilitate the control design and the stability analysis. An adaptive estimation law is designed to compensate for the lack of unknown depth information. Experimental results are provided to demonstrate the performance of the visual servo tracking controller.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895678
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 136-142
Titre : Feedback control of oxygen uptake during robot-assisted gait Type de document : texte imprimé Auteurs : Andrew Pennycott, Auteur ; Kenneth Hunt, Auteur ; Sylvie Coupaud, Auteur Année de publication : 2011 Article en page(s) : pp. 136-142 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Feedback control Rehabilitation engineering Robot-assisted gait Spinal cord injury System identification Index. décimale : 629.1 Résumé : Body-weight-supported robot-assisted devices can be used to promote gait rehabilitation and as exercise tools for neurologically impaired persons such as stroke and spinal-cord-injured patients. Here, we propose a novel feedback-control structure for real-time control of oxygen uptake during robot-assisted gait, in which we use the following methods. 1) A feedback-control structure is proposed, consisting of a dynamic controller operating on target and actual levels of oxygen uptake in order to set a target work rate. Target work rate is achieved by an inner volitional feedback loop which relies on the subject's exercise input. 2) The dynamic oxygen-uptake controller is based on an empirically derived model of the oxygen-uptake dynamics and is synthesized by pole placement. 3) The resulting control system is tested during the robot-assisted treadmill ambulation of five able-bodied subjects. A single linear controller was designed based on identification data from tests with one subject and used for closed-loop control tests with all five subjects. In all cases, the actual oxygen-uptake response closely followed the ideal response as specified by the feedback design parameters. The control of oxygen uptake during body-weight-supported robot-assisted ambulation is feasible in the able-bodied population; the robustness of the system is demonstrated within the class of subjects tested. Further testing is required to validate the approach with neurologically impaired subjects.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895717 [article] Feedback control of oxygen uptake during robot-assisted gait [texte imprimé] / Andrew Pennycott, Auteur ; Kenneth Hunt, Auteur ; Sylvie Coupaud, Auteur . - 2011 . - pp. 136-142.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 136-142
Mots-clés : Feedback control Rehabilitation engineering Robot-assisted gait Spinal cord injury System identification Index. décimale : 629.1 Résumé : Body-weight-supported robot-assisted devices can be used to promote gait rehabilitation and as exercise tools for neurologically impaired persons such as stroke and spinal-cord-injured patients. Here, we propose a novel feedback-control structure for real-time control of oxygen uptake during robot-assisted gait, in which we use the following methods. 1) A feedback-control structure is proposed, consisting of a dynamic controller operating on target and actual levels of oxygen uptake in order to set a target work rate. Target work rate is achieved by an inner volitional feedback loop which relies on the subject's exercise input. 2) The dynamic oxygen-uptake controller is based on an empirically derived model of the oxygen-uptake dynamics and is synthesized by pole placement. 3) The resulting control system is tested during the robot-assisted treadmill ambulation of five able-bodied subjects. A single linear controller was designed based on identification data from tests with one subject and used for closed-loop control tests with all five subjects. In all cases, the actual oxygen-uptake response closely followed the ideal response as specified by the feedback design parameters. The control of oxygen uptake during body-weight-supported robot-assisted ambulation is feasible in the able-bodied population; the robustness of the system is demonstrated within the class of subjects tested. Further testing is required to validate the approach with neurologically impaired subjects.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895717
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 143-151
Titre : Dynamic compensation control of flexible macro–micro manipulator systems Type de document : texte imprimé Auteurs : Tang Wen Yang, Auteur ; Wei Liang Xu, Auteur ; Jian Da Han, Auteur Année de publication : 2011 Article en page(s) : pp. 143-151 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Endpoint control Error compensation Flexible manipulators Macro-micro systems Index. décimale : 629.1 Résumé : Macro-micro architecture, which consists of macro and micro manipulators, is used here to eliminate errors at the tip of a flexible manipulator. The macro uses long arms and has such advantages as larger work volume and lower energy consumption but suffers from large deformations and vibrations. The micro is a smaller rigid manipulator and is attached on the end of the macro to isolate the system endpoint from the undesirable flexibility of the macro. Using perturbation theories, a new kinematical method is introduced, first, by redefining the micro's motion as a means of compensating for the errors at the endpoint of the macro. Then, an excellent practical control scheme is proposed to realize the endpoint control with the feedback of joint angles and vibrations. A PD controller is applied to the micro, which augmented the compensation quantities. To damp out vibrations, a nonlinear control law is proposed for the macro, taking the interacting dynamics of the micro to the macro into account. The compensation and control algorithms work very well on a macro-micro setup, and numerous experimental results prove the applicability of the proposed schemes.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4814532 [article] Dynamic compensation control of flexible macro–micro manipulator systems [texte imprimé] / Tang Wen Yang, Auteur ; Wei Liang Xu, Auteur ; Jian Da Han, Auteur . - 2011 . - pp. 143-151.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 143-151
Mots-clés : Endpoint control Error compensation Flexible manipulators Macro-micro systems Index. décimale : 629.1 Résumé : Macro-micro architecture, which consists of macro and micro manipulators, is used here to eliminate errors at the tip of a flexible manipulator. The macro uses long arms and has such advantages as larger work volume and lower energy consumption but suffers from large deformations and vibrations. The micro is a smaller rigid manipulator and is attached on the end of the macro to isolate the system endpoint from the undesirable flexibility of the macro. Using perturbation theories, a new kinematical method is introduced, first, by redefining the micro's motion as a means of compensating for the errors at the endpoint of the macro. Then, an excellent practical control scheme is proposed to realize the endpoint control with the feedback of joint angles and vibrations. A PD controller is applied to the micro, which augmented the compensation quantities. To damp out vibrations, a nonlinear control law is proposed for the macro, taking the interacting dynamics of the micro to the macro into account. The compensation and control algorithms work very well on a macro-micro setup, and numerous experimental results prove the applicability of the proposed schemes.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4814532
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 152-163
Titre : Passive actuators' fault-tolerant control for affine nonlinear systems Type de document : texte imprimé Auteurs : Benosman, M., Auteur ; K.-Y. Lum, Auteur Année de publication : 2011 Article en page(s) : pp. 152-163 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Actuator faults Lyapunov-based contro Nonlinear systems Passive fault-tolerant control (FTC) Index. décimale : 629.1 Résumé : In this brief, the problem of passive fault-tolerant control (FTC) for nonlinear affine systems with actuator faults is considered. Two types of faults, additive and loss-of-effectiveness faults, are treated. In each case, a Lyapunov-based feedback controller is proposed, which ensures the local uniform asymptotic (exponential) stability of the faulty system, if the safe nominal system is locally uniformly asymptotically (exponentially) stable. The effectiveness of the FT controllers is shown on the autonomous helicopter numerical example.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4908917 [article] Passive actuators' fault-tolerant control for affine nonlinear systems [texte imprimé] / Benosman, M., Auteur ; K.-Y. Lum, Auteur . - 2011 . - pp. 152-163.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 152-163
Mots-clés : Actuator faults Lyapunov-based contro Nonlinear systems Passive fault-tolerant control (FTC) Index. décimale : 629.1 Résumé : In this brief, the problem of passive fault-tolerant control (FTC) for nonlinear affine systems with actuator faults is considered. Two types of faults, additive and loss-of-effectiveness faults, are treated. In each case, a Lyapunov-based feedback controller is proposed, which ensures the local uniform asymptotic (exponential) stability of the faulty system, if the safe nominal system is locally uniformly asymptotically (exponentially) stable. The effectiveness of the FT controllers is shown on the autonomous helicopter numerical example.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4908917
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 164-169
Titre : Robust fuzzy control of an active magnetic bearing subject to voltage saturation Type de document : texte imprimé Auteurs : Haiping Du, Auteur ; Nong Zhang, Auteur ; J. C. Ji, Auteur Année de publication : 2011 Article en page(s) : pp. 164-169 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Input saturation Magnetic leviation Nonlinear system Robust control T-S fuzzy model Index. décimale : 629.1 Résumé : Based on a recently proposed model for the active-magnetic-bearing (AMB) switching mode of operation, this paper presents a robust Takagi-Sugeno-model-based fuzzy-control strategy to stabilize the AMB with fast response speed subject to control-voltage saturation and parameter uncertainties. The sufficient conditions for the existence of such a controller are derived in terms of linear matrix inequalities. Numerical simulations against the proposed AMB model and a high-fidelity AMB model are used to validate the effectiveness of the proposed approach.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4815390 [article] Robust fuzzy control of an active magnetic bearing subject to voltage saturation [texte imprimé] / Haiping Du, Auteur ; Nong Zhang, Auteur ; J. C. Ji, Auteur . - 2011 . - pp. 164-169.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 164-169
Mots-clés : Input saturation Magnetic leviation Nonlinear system Robust control T-S fuzzy model Index. décimale : 629.1 Résumé : Based on a recently proposed model for the active-magnetic-bearing (AMB) switching mode of operation, this paper presents a robust Takagi-Sugeno-model-based fuzzy-control strategy to stabilize the AMB with fast response speed subject to control-voltage saturation and parameter uncertainties. The sufficient conditions for the existence of such a controller are derived in terms of linear matrix inequalities. Numerical simulations against the proposed AMB model and a high-fidelity AMB model are used to validate the effectiveness of the proposed approach.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4815390
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 170-176
Titre : Identification of multichannel cardiovascular dynamics using dual laguerre basis functions for noninvasive cardiovascular monitoring Type de document : texte imprimé Auteurs : Jin-Oh Hahn, Auteur ; Devin B. McCombie, Auteur ; Andrew T. Reisner, Auteur Année de publication : 2011 Article en page(s) : pp. 170-176 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Cardiovascular (CV) system Laguerre basis function Nonivasive CV monitoring Two-channel blind system identification (ID) Index. décimale : 629.1 Résumé : This paper presents a novel method to identify the cardiovascular (CV) system using two distinct peripheral blood pressure (BP) signals. The method can characterize the distinct arterial path dynamics that shape each of the BP signals and recover the common central-flow signal fed to them. A Laguerre series data-compression technique is used to obtain a compact representation of the CV system, whose coefficients are identified using the multichannel blind system identification. A Laguerre model deconvolution algorithm is developed to stably recover the central-flow signal. Persistent excitation, model identifiability, and asymptotic variance are analyzed to quantify the method's validity and reliability, without using any direct measurement of central-flow input signal. Experimental results based on 7000 data segments obtained from nine swine subjects show that, for all the swine subjects under diverse physiologic conditions, the CV dynamics can be identified very reliably and the waveform of the central flow can be recovered stably from peripheral BP signals.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4815388 [article] Identification of multichannel cardiovascular dynamics using dual laguerre basis functions for noninvasive cardiovascular monitoring [texte imprimé] / Jin-Oh Hahn, Auteur ; Devin B. McCombie, Auteur ; Andrew T. Reisner, Auteur . - 2011 . - pp. 170-176.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 170-176
Mots-clés : Cardiovascular (CV) system Laguerre basis function Nonivasive CV monitoring Two-channel blind system identification (ID) Index. décimale : 629.1 Résumé : This paper presents a novel method to identify the cardiovascular (CV) system using two distinct peripheral blood pressure (BP) signals. The method can characterize the distinct arterial path dynamics that shape each of the BP signals and recover the common central-flow signal fed to them. A Laguerre series data-compression technique is used to obtain a compact representation of the CV system, whose coefficients are identified using the multichannel blind system identification. A Laguerre model deconvolution algorithm is developed to stably recover the central-flow signal. Persistent excitation, model identifiability, and asymptotic variance are analyzed to quantify the method's validity and reliability, without using any direct measurement of central-flow input signal. Experimental results based on 7000 data segments obtained from nine swine subjects show that, for all the swine subjects under diverse physiologic conditions, the CV dynamics can be identified very reliably and the waveform of the central flow can be recovered stably from peripheral BP signals.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4815388
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 177-184
Titre : Iterative tuning of internal model controllers with application to air/fuel ratio control Type de document : texte imprimé Auteurs : Daniel Rupp, Auteur ; Lino Guzzella, Auteur Année de publication : 2011 Article en page(s) : pp. 177-184 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Air/fuel ratio (AFR) Identification for control Internal model control Iterative feedbak tuning (IFT) Oxygen sensor Index. décimale : 629.1 Résumé : A new tuning method for internal model controllers (IMCs) is presented. The parameters of an IMC can be structurally assigned to two groups: 1) parameters of the internal model and 2) parameters of the controller. The method described in this brief suggests a sequential tuning of the two parameter groups. For both groups, the parameter values are found by minimizing a predefined cost function. The optimization is run with a gradient-based minimization procedure where, analogously to the well-known iterative feedback tuning (IFT) scheme, the gradients are computed from signals obtained from closed-loop experiments. Thus, for the calculation of the gradient, the unknown plant is utilized, whereas other ??local?? tuning methods suggest the replacement of the real plant by its model to calculate the gradient. The main advantages of the suggested algorithm are its inherent operation in the closed control loop and the fact that, for the tuning of the internal model, no information about the disturbance model is required. The method can be used either for an initial tuning of the controller or for autotuning during operation.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5075514 [article] Iterative tuning of internal model controllers with application to air/fuel ratio control [texte imprimé] / Daniel Rupp, Auteur ; Lino Guzzella, Auteur . - 2011 . - pp. 177-184.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 177-184
Mots-clés : Air/fuel ratio (AFR) Identification for control Internal model control Iterative feedbak tuning (IFT) Oxygen sensor Index. décimale : 629.1 Résumé : A new tuning method for internal model controllers (IMCs) is presented. The parameters of an IMC can be structurally assigned to two groups: 1) parameters of the internal model and 2) parameters of the controller. The method described in this brief suggests a sequential tuning of the two parameter groups. For both groups, the parameter values are found by minimizing a predefined cost function. The optimization is run with a gradient-based minimization procedure where, analogously to the well-known iterative feedback tuning (IFT) scheme, the gradients are computed from signals obtained from closed-loop experiments. Thus, for the calculation of the gradient, the unknown plant is utilized, whereas other ??local?? tuning methods suggest the replacement of the real plant by its model to calculate the gradient. The main advantages of the suggested algorithm are its inherent operation in the closed control loop and the fact that, for the tuning of the internal model, no information about the disturbance model is required. The method can be used either for an initial tuning of the controller or for autotuning during operation.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5075514
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 185-193
Titre : Decentralized feedback structures of a vapor compression cycle system Type de document : texte imprimé Auteurs : Neera Jain, Auteur ; Bin Li, Auteur ; Michael Keir, Auteur Année de publication : 2011 Article en page(s) : pp. 185-193 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Air conditioning Decoupling Decentralized HVAC Multivariable control Refrigeration Index. décimale : 629.1 Résumé : In vapor compression cycle systems, it is desirable to effectively control the thermodynamic cycle by controlling the thermodynamic states of the refrigerant. By controlling the thermodynamic states with an inner loop, supervisory algorithms can manage critical functions and objectives such as maintaining superheat and maximizing the coefficient of performance. In practice, it is generally preferred to tune multiple single-input-single-output (SISO) control inner loops rather than a single multiple-input-multiple-output control inner loop. This paper presents a process by which a simplified feedback control structure, amenable to a decoupled SISO control loop design, may be identified. In particular, the many possible candidate input-output (I/O) pairs for decentralized control are sorted via a decoupling metric, called the relative gain array number. From a reduced set of promising candidate I/O pairs, engineering insight is applied to arrive at the most effective pairings successfully verified on an experimental air-conditioning-and-refrigeration test stand.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895680 [article] Decentralized feedback structures of a vapor compression cycle system [texte imprimé] / Neera Jain, Auteur ; Bin Li, Auteur ; Michael Keir, Auteur . - 2011 . - pp. 185-193.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 185-193
Mots-clés : Air conditioning Decoupling Decentralized HVAC Multivariable control Refrigeration Index. décimale : 629.1 Résumé : In vapor compression cycle systems, it is desirable to effectively control the thermodynamic cycle by controlling the thermodynamic states of the refrigerant. By controlling the thermodynamic states with an inner loop, supervisory algorithms can manage critical functions and objectives such as maintaining superheat and maximizing the coefficient of performance. In practice, it is generally preferred to tune multiple single-input-single-output (SISO) control inner loops rather than a single multiple-input-multiple-output control inner loop. This paper presents a process by which a simplified feedback control structure, amenable to a decoupled SISO control loop design, may be identified. In particular, the many possible candidate input-output (I/O) pairs for decentralized control are sorted via a decoupling metric, called the relative gain array number. From a reduced set of promising candidate I/O pairs, engineering insight is applied to arrive at the most effective pairings successfully verified on an experimental air-conditioning-and-refrigeration test stand.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4895680
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 194-200
Titre : LuGre-model-based friction compensation Type de document : texte imprimé Auteurs : Leonid Freidovich, Auteur ; Anders Robertsson, Auteur ; Anton Shiriaev, Auteur Année de publication : 2011 Article en page(s) : pp. 194-200 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Friction compensation LuGre model Observer design Real-time implementation Index. décimale : 629.1 Résumé : A tracking problem for a mechanical system is considered. We start with a feedback controller that is designed without attention to disturbances, which are assumed to be adequately described by a dynamic LuGre friction model. We are interested in deriving a superimposed observer-based compensator to annihilate or reduce the influence of such a disturbance. We exploit a recently suggested approach for observer design for LuGre-friction-model-based compensation. In order to apply this technique, it is necessary to know the Lyapunov function for the unperturbed system, as well as the parameters of the dynamic friction model, and to verify that a certain structural property satisfied. The case when the system is passive with respect to the matching disturbance related to the given Lyapunov function is illustrated in this brief with a DC-motor example. The main contribution is some new insights into the numerical real-time implementation of a compensator for disturbances describable by one of various LuGre-type models. The other contribution, which is built upon the main one, is experimental verification of the suggested model-based observer design procedure.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5291704 [article] LuGre-model-based friction compensation [texte imprimé] / Leonid Freidovich, Auteur ; Anders Robertsson, Auteur ; Anton Shiriaev, Auteur . - 2011 . - pp. 194-200.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 194-200
Mots-clés : Friction compensation LuGre model Observer design Real-time implementation Index. décimale : 629.1 Résumé : A tracking problem for a mechanical system is considered. We start with a feedback controller that is designed without attention to disturbances, which are assumed to be adequately described by a dynamic LuGre friction model. We are interested in deriving a superimposed observer-based compensator to annihilate or reduce the influence of such a disturbance. We exploit a recently suggested approach for observer design for LuGre-friction-model-based compensation. In order to apply this technique, it is necessary to know the Lyapunov function for the unperturbed system, as well as the parameters of the dynamic friction model, and to verify that a certain structural property satisfied. The case when the system is passive with respect to the matching disturbance related to the given Lyapunov function is illustrated in this brief with a DC-motor example. The main contribution is some new insights into the numerical real-time implementation of a compensator for disturbances describable by one of various LuGre-type models. The other contribution, which is built upon the main one, is experimental verification of the suggested model-based observer design procedure.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5291704
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 201-212
Titre : Fault detection for a class of uncertain state-feedback control systems Type de document : texte imprimé Auteurs : Yang, Guang-Hong, Auteur ; Heng Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 201-212 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Fault detection Linear martrix inequality (LMI) Linear systems State feedback Tracking Index. décimale : 629.1 Résumé : This brief studies the problem of fault detection for a class of uncertain state-feedback tracking control systems with constant reference inputs and bounded disturbances. The considered systems are modeled via multiple modes, namely, fault-free case and faulty cases. Actuator stuck faults, including outage cases, are considered. With the aid of the finite-frequency positive-realness approach, a new linear-matrix-inequality-based fault detection method for control systems is obtained and applied to fault detection for flight control systems. An F-18 aircraft model is included in the simulation to illustrate the effectiveness of the proposed method.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4837629 [article] Fault detection for a class of uncertain state-feedback control systems [texte imprimé] / Yang, Guang-Hong, Auteur ; Heng Wang, Auteur . - 2011 . - pp. 201-212.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 201-212
Mots-clés : Fault detection Linear martrix inequality (LMI) Linear systems State feedback Tracking Index. décimale : 629.1 Résumé : This brief studies the problem of fault detection for a class of uncertain state-feedback tracking control systems with constant reference inputs and bounded disturbances. The considered systems are modeled via multiple modes, namely, fault-free case and faulty cases. Actuator stuck faults, including outage cases, are considered. With the aid of the finite-frequency positive-realness approach, a new linear-matrix-inequality-based fault detection method for control systems is obtained and applied to fault detection for flight control systems. An F-18 aircraft model is included in the simulation to illustrate the effectiveness of the proposed method.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4837629
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 213-221
Titre : Feed-forward control of open channel flow using differential flatness Type de document : texte imprimé Auteurs : Tarek S. Rabbani, Auteur ; Florent Di Meglio, Auteur ; Xavier Litrico, Auteur Année de publication : 2011 Article en page(s) : pp. 213-221 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Differentail flatness Diffusive wave equation Open channel hydraulics Trajectory planning Water management Index. décimale : 629.1 Résumé : This brief derives a method for open-loop control of open channel flow, based on the Hayami model, a parabolic partial differential equation resulting from a simplification of the Saint-Venant equations. The open-loop control is represented as infinite series using differential flatness, for which convergence is assessed. A comparison is made with a similar problem available in the literature for thermal systems. Numerical simulations show the effectiveness of the approach by applying the open-loop controller to irrigation canals modeled by the full Saint-Venant equations.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5169829 [article] Feed-forward control of open channel flow using differential flatness [texte imprimé] / Tarek S. Rabbani, Auteur ; Florent Di Meglio, Auteur ; Xavier Litrico, Auteur . - 2011 . - pp. 213-221.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 213-221
Mots-clés : Differentail flatness Diffusive wave equation Open channel hydraulics Trajectory planning Water management Index. décimale : 629.1 Résumé : This brief derives a method for open-loop control of open channel flow, based on the Hayami model, a parabolic partial differential equation resulting from a simplification of the Saint-Venant equations. The open-loop control is represented as infinite series using differential flatness, for which convergence is assessed. A comparison is made with a similar problem available in the literature for thermal systems. Numerical simulations show the effectiveness of the approach by applying the open-loop controller to irrigation canals modeled by the full Saint-Venant equations.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5169829
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 222-229
Titre : Robust nonlinear model predictive control of a run-of-mine ore milling circuit Type de document : texte imprimé Auteurs : Loutjie C. Coetzee, Auteur ; Ian K. Craig, Auteur ; Eric C. Kerrigan, Auteur Année de publication : 2011 Article en page(s) : pp. 222-229 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Grinding mill Milling circuit Process control Robust nonlinear model predictive control (RNMPC) Run-of-mine (ROM) ore Index. décimale : 629.1 Résumé : This brief investigates the feasibility of applying a robust nonlinear model predictive controller to a run-of-mine ore milling circuit, and the conditions under which such a controller might be worthwhile implementing. The run-of-mine ore milling circuit model used consists of nonlinear modules for the individual components of the milling circuit, allowing for arbitrary milling circuit configurations to be modeled. The model is cast into a robust nonlinear model predictive control framework, and a practically motivated simulation of the mill model being controlled by an robust nonlinear model predictive control (RNMPC) controller is presented. Issues related to implementing such a controller are investigated.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4806139 [article] Robust nonlinear model predictive control of a run-of-mine ore milling circuit [texte imprimé] / Loutjie C. Coetzee, Auteur ; Ian K. Craig, Auteur ; Eric C. Kerrigan, Auteur . - 2011 . - pp. 222-229.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 222-229
Mots-clés : Grinding mill Milling circuit Process control Robust nonlinear model predictive control (RNMPC) Run-of-mine (ROM) ore Index. décimale : 629.1 Résumé : This brief investigates the feasibility of applying a robust nonlinear model predictive controller to a run-of-mine ore milling circuit, and the conditions under which such a controller might be worthwhile implementing. The run-of-mine ore milling circuit model used consists of nonlinear modules for the individual components of the milling circuit, allowing for arbitrary milling circuit configurations to be modeled. The model is cast into a robust nonlinear model predictive control framework, and a practically motivated simulation of the mill model being controlled by an robust nonlinear model predictive control (RNMPC) controller is presented. Issues related to implementing such a controller are investigated.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4806139
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 230-237
Titre : Consensus tracking under directed interaction topologies : algorithms and experiments Type de document : texte imprimé Auteurs : Wei Ren, Auteur Année de publication : 2011 Article en page(s) : pp. 230-237 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Consensus Cooperative control Formation control Multi-vehicle systems Index. décimale : 629.1 Résumé : Consensus tracking problems with, respectively, bounded control effort and directed switching interaction topologies are considered when a time-varying consensus reference state is available to only a subgroup of a team and the team members have only local interaction. A consensus tracking algorithm explicitly accounting for bounded control effort is proposed and analyzed under a directed fixed interaction topology. Furthermore, convergence analysis for a consensus tracking algorithm is provided when the time-varying consensus reference state is available to a dynamically changing subgroup of the team under directed switching inter-vehicle interaction topologies. Experimental results of a formation control application are demonstrated on a multi-robot platform to validate one of the proposed consensus tracking algorithms.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5229136 [article] Consensus tracking under directed interaction topologies : algorithms and experiments [texte imprimé] / Wei Ren, Auteur . - 2011 . - pp. 230-237.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 230-237
Mots-clés : Consensus Cooperative control Formation control Multi-vehicle systems Index. décimale : 629.1 Résumé : Consensus tracking problems with, respectively, bounded control effort and directed switching interaction topologies are considered when a time-varying consensus reference state is available to only a subgroup of a team and the team members have only local interaction. A consensus tracking algorithm explicitly accounting for bounded control effort is proposed and analyzed under a directed fixed interaction topology. Furthermore, convergence analysis for a consensus tracking algorithm is provided when the time-varying consensus reference state is available to a dynamically changing subgroup of the team under directed switching inter-vehicle interaction topologies. Experimental results of a formation control application are demonstrated on a multi-robot platform to validate one of the proposed consensus tracking algorithms.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5229136
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 238-245
Titre : Robust sampled-data H (infinity) control for vehicle active suspension systems Type de document : texte imprimé Auteurs : Huijun, Gao, Auteur ; Weichao Sun, Auteur ; Peng, Shi, Auteur Année de publication : 2011 Article en page(s) : pp. 238-245 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Active suspension system Convex polytope H (infinity) control Parameter uncertainty Sampled-data control Index. décimale : 629.1 Résumé : This brief investigates the problem of robust sampled-data H ∞ control for active vehicle suspension systems. By using an input delay approach, the active vehicle suspension system with sampling measurements is transformed into a continuous-time system with a delay in the state. The transformed system contains non-differentiable time-varying state delay and polytopic parameter uncertainties. A Lyapunov functional approach is employed to establish the H ∞ performance, and the controller design is cast into a convex optimization problem with linear matrix inequality (LMI) constraints. A quarter-car model is considered in this brief and the effectiveness of the proposed approach is illustrated by a realistic design example.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5291703 [article] Robust sampled-data H (infinity) control for vehicle active suspension systems [texte imprimé] / Huijun, Gao, Auteur ; Weichao Sun, Auteur ; Peng, Shi, Auteur . - 2011 . - pp. 238-245.
Génie Aérospatial
Langues : Anglais (eng)
in IEEE Transactions on control systems technology > Vol. 18 N° 1 (Janvier 2010) . - pp. 238-245
Mots-clés : Active suspension system Convex polytope H (infinity) control Parameter uncertainty Sampled-data control Index. décimale : 629.1 Résumé : This brief investigates the problem of robust sampled-data H ∞ control for active vehicle suspension systems. By using an input delay approach, the active vehicle suspension system with sampling measurements is transformed into a continuous-time system with a delay in the state. The transformed system contains non-differentiable time-varying state delay and polytopic parameter uncertainties. A Lyapunov functional approach is employed to establish the H ∞ performance, and the controller design is cast into a convex optimization problem with linear matrix inequality (LMI) constraints. A quarter-car model is considered in this brief and the effectiveness of the proposed approach is illustrated by a realistic design example.
DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5291703
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