The Experts below are selected from a list of 20808 Experts worldwide ranked by ideXlab platform
W. P. M. H. Heemels - One of the best experts on this subject based on the ideXlab platform.
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Switching Control IN ACTIVE VIBRATION ISOLATION
2020Co-Authors: Marcel Francois Heertjes, Van De N Nathan Wouw, W. P. M. H. HeemelsAbstract:In this paper, a Switching Control approach is studied with applications to active vibration isolation. The Control design is based on the concept of input-to-state stability of the resulting discontinuous feedback system with respect to disturbances. The Switching Control strategy demonstrates improved disturbance rejection under feedback combined with a small sensitivity to noise in the absence of such feedback. Herein the Control effort needed to achieve improved performance is substantially reduced. To access the performance of the closed-loop system, the Control scheme is tested on a commercially available isolation system.
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Switching Control in vibration isolation systems
IEEE Transactions on Control Systems Technology, 2013Co-Authors: Marcel Francois Heertjes, Ismail Hakki Sahin, Nathan Van De Wouw, W. P. M. H. HeemelsAbstract:In this paper, a Switching Control approach for active vibration isolation systems is proposed. The Switching involves two regimes. In the first regime, no feedback Control is applied thereby giving a low sensitivity to noise. In the second regime, active Control induces improved disturbance rejection properties, but at the cost of increased noise sensitivity. Conditions for the stability of the Switching closed-loop system are formulated whereas the stability analysis provides design rules for tuning the Switching Controller. Given this novel active vibration isolation approach, improved isolation performance is obtained with substantially less Control authority in comparison to the case of linear (or non-Switching) feedback Control. Performance analysis is based on multi-resolution time-frequency analysis using measurements taken from a commercial vibration isolation system.
Amir G. Aghdam - One of the best experts on this subject based on the ideXlab platform.
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Supervisory Control of Switching Control systems
Systems & Control Letters, 2008Co-Authors: M. M. Tousi, I. Karuei, S. Hashtrudi-zad, Amir G. AghdamAbstract:In this paper, the problem of designing a Switching policy for an adaptive Switching Control system is formulated as a problem of supervisory Control of a discrete-event system (DES). Two important problems in Switching Control are then addressed using the DES formulation and the theory of supervisory Control under partial observation. First, it is verified whether for a given set of Controllers, a Switching policy satisfying a given set of constraints on the transitions among Controllers exists. If so, then a minimally restrictive Switching policy is designed. Next, an iterative algorithm is introduced for finding a minimal set of Controllers for which a Switching policy satisfying the Switching constraints exists. It is shown that in the supervisory Control problem considered in this paper, limitations on event observation are the factors that essentially restrict supervisory Control. In other words, once observation limitations are respected, limitations on Control will be automatically satisfied. This result is used to simplify the proposed iterative algorithm for finding minimal Controller sets.
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Supervisory Control of Switching Control systems
Proceedings of the 45th IEEE Conference on Decision and Control, 2006Co-Authors: M. M. Tousi, I. Karuei, S. Hashtrudi-zad, Amir G. AghdamAbstract:In this paper, the problem of designing a Switching policy for an adaptive Switching Control system is formulated as a problem of supervisory Control of a Discrete-Event System (DES). Two important problems in Switching Control are then addressed using the DES formulation and the theory of supervisory Control under partial observation. First, it is verified whether for a given set of Controllers, a Switching policy satisfying a given set of constraints on the transitions among Controllers exists. If so, then a minimally restrictive Switching policy is designed. Next, an iterative algorithm is introduced for finding a minimal set of Controllers for which a Switching policy satisfying the Switching constraints exists. It is shown that in the supervisory Control problem considered in this paper, limitations on event observation are the factors that essentially restrict supervisory Control. In other words, once observation limitations are respected, limitations on Control will be automatically satisfied. This result is used to simplify the proposed iterative algorithm for finding minimal Controller sets.
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Switching Control for time-delay systems
2006 American Control Conference, 2006Co-Authors: A. Momeni, Amir G. AghdamAbstract:In this paper, a Switching Control scheme for uncertain time-delay LTI systems is presented. It is assumed that the plant is described by a family of known Controllable and observable LTI systems with delay in the states, and that a bound on the magnitude of the exogenous disturbances is available. It is shown that exact tracking can be achieved in the presence of external disturbances, if some mild conditions hold
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Switching Control using generalized sampled-data hold functions
Proceedings of 2005 IEEE Conference on Control Applications, 2005. CCA 2005., 2005Co-Authors: Shahram Zahirazami, Amir G. AghdamAbstract:In this paper, Switching Control of linear time-invariant systems using generalized sampled-data hold functions is investigated. It is assumed that the plant model belongs to a finite set of known plants. The output of the system is periodically sampled and a Control signal is being generated by means of a suitable hold function which solves the robust servomechanism problem for a family of plant models. It is also desirable to achieve a digital Control law that reduces the complexity of online computations
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Decentralized Switching Control
IFAC Proceedings Volumes, 1998Co-Authors: Amir G. Aghdam, Edward J. DavisonAbstract:Abstract The focus of this paper is directed towards the adaptive Control of decentralized systems, using "Switching Control" methods (Miller and Davison 1990), (Chang and Davison 1995), (Morse 1996), (Narendra and Balakrishnan 1994). In this type of problem, it is desired to find a high performance Controller for a decentralized system, when the plant model is highly uncertain, i.e., when uncertainty in the plant model is sufficiently large that a fixed LTI Controller or traditional adaptive Controller is ineffective to use. To accomplish this goal, it will be assumed that the Switching Controller may "switch" from a "dictionary" of calculated decentralized Controllers.
Xinghuo Yu - One of the best experts on this subject based on the ideXlab platform.
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Robust Pinning Synchronization of Complex Network with Non-linear Coupling using Switching Control
2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018Co-Authors: Jyoti P. Mishra, Mahdi Jalili, Xinghuo YuAbstract:This paper describes pinning synchronization of a complex dynamical network consisting of N identical nodes. The nodes are interconnected by a time-varying non-linear coupling terms, which has a general type with some constraints. Many non-linear coupling forms can be modeled as the one considered in this work. The network synchronization is achieved by using non-linear Switching Control. The stability of the synchronization is proven mathematically using Lyapunov analysis. It is shown that the proposed Controller performs well in the presence of disturbances. Finally, simulation examples of Lorenz oscillator networks are given to verify the theoretical results. The simulations show that the proposed Switching Control outperforms classical linear Control by providing not only faster synchronization, but also better robustness against external disturbances.
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Switching Control design for inverter-fed induction motors
International Journal of Modelling and Simulation, 2016Co-Authors: Xinghuo Yu, Wardina OghannaAbstract:This paper develops a Switching Control design for the direct torque Control of inverter-fed induction motors. The Control design is based on the Lyapunov approach, which enables a complete stability analysis. The system is shown to be globally asymptotically stable under the proposed Switching Control design. In practice, due to finite Switching values, the Switching cannot be arbitrarily activated. According to the available inverter-fed induction motor Switching Control vectors, the Switching Control design is modified and the condition for stability is discussed. Simulation results are presented to show the effectiveness of the Control strategy.
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Switching Control strategy for the power system stabilization problem
International Journal of Control, 2007Co-Authors: Xinghuo Yu, Hebertt Sira-ramírez, Gerard LedwichAbstract:A Switching Control strategy is proposed for the stabilization of the simplest form of a power system. The underlying Switching Control strategy is represented by the pulsed addition of an inductive impedance to the transmission line, through a suitable and well-known arrangement of Switching thyristors. It is proved that there exists a local stabilizing sliding mode. The energy function of the system is used as a Lyapunov function to derive a Switching Control which guarantees the reachability of the sliding surface from the stability region. The Switching Control scheme is also implemented via a reduced-order nonlinear observer based on exact error linearization achieved through nonlinear output injection. Numerical simulations are presented.
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Discretization behavior analysis of a Switching Control system from a unified mathematical approach
Journal of Control Theory and Applications, 2003Co-Authors: Xinghuo Yu, Ling Yang, Guanrong ChenAbstract:A useful unified analysis framework is proposed for exploring the intriguing behaviors of a second-order Switching Control system. Complex discretization behaviors of the Switching Control system are explored in detail, and some intrinsic relationships between the system periodic behaviors and their associated symbolic sequences are studied.
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DISCRETIZATION CHAOS IN THE Switching Control SYSTEM WITH FINITE Switching VALUES
International Journal of Bifurcation and Chaos, 1995Co-Authors: Xinghuo YuAbstract:A case study is presented to demonstrate the discretization chaos in the Switching Control system with only finite Switching values. It is proved that for the second order oscillator, with several classes of sampling periods, discrete Switching Control enables periodic motions around the desired equilibrium. The pattern of the discretized system is determined by the initial conditions as well as the sampling periods. Simulation results are presented to confirm the theoretical investigations.
Tzyh-jong Tarn - One of the best experts on this subject based on the ideXlab platform.
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ICRA - A Switching Control strategy for nonlinear dynamic systems
2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422), 2003Co-Authors: Mingjun Zhang, Tzyh-jong TarnAbstract:This paper proposes a Switching Control strategy for nonlinear dynamic systems. No special assumptions are made about the type of nonlinearities of the system, except that such nonlinearities are smooth. Stability proof of the Switching Control, and an example for using the Switching Control are given in this paper. The Switching Control framework has been applied extensively for feedback stabilization of the Pendubot - a two link under-actuated mechanical system [Mingjun Zhang et al., March 2002].
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A Switching Control strategy for nonlinear dynamic systems
2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422), 2003Co-Authors: Mingjun Zhang, Tzyh-jong TarnAbstract:This paper proposes a Switching Control strategy for nonlinear dynamic systems. No special assumptions are made about the type of nonlinearities of the system, except that such nonlinearities are smooth. Stability proof of the Switching Control, and an example for using the Switching Control are given in this paper. The Switching Control framework has been applied extensively for feedback stabilization of the Pendubot - a two link under-actuated mechanical system [Mingjun Zhang et al., March 2002].
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A hybrid Switching Control strategy for nonlinear and underactuated mechanical systems
IEEE Transactions on Automatic Control, 2003Co-Authors: Mingjun Zhang, Tzyh-jong TarnAbstract:This note presents a hybrid Switching Control strategy for nonlinear and underactuated mechanical systems. Sufficient conditions for constructing the hybrid Switching Control, stability proof, and experimental results for using the hybrid Switching Control are given.
Marcel Francois Heertjes - One of the best experts on this subject based on the ideXlab platform.
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Switching Control IN ACTIVE VIBRATION ISOLATION
2020Co-Authors: Marcel Francois Heertjes, Van De N Nathan Wouw, W. P. M. H. HeemelsAbstract:In this paper, a Switching Control approach is studied with applications to active vibration isolation. The Control design is based on the concept of input-to-state stability of the resulting discontinuous feedback system with respect to disturbances. The Switching Control strategy demonstrates improved disturbance rejection under feedback combined with a small sensitivity to noise in the absence of such feedback. Herein the Control effort needed to achieve improved performance is substantially reduced. To access the performance of the closed-loop system, the Control scheme is tested on a commercially available isolation system.
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Switching Control in vibration isolation systems
IEEE Transactions on Control Systems Technology, 2013Co-Authors: Marcel Francois Heertjes, Ismail Hakki Sahin, Nathan Van De Wouw, W. P. M. H. HeemelsAbstract:In this paper, a Switching Control approach for active vibration isolation systems is proposed. The Switching involves two regimes. In the first regime, no feedback Control is applied thereby giving a low sensitivity to noise. In the second regime, active Control induces improved disturbance rejection properties, but at the cost of increased noise sensitivity. Conditions for the stability of the Switching closed-loop system are formulated whereas the stability analysis provides design rules for tuning the Switching Controller. Given this novel active vibration isolation approach, improved isolation performance is obtained with substantially less Control authority in comparison to the case of linear (or non-Switching) feedback Control. Performance analysis is based on multi-resolution time-frequency analysis using measurements taken from a commercial vibration isolation system.
