The Experts below are selected from a list of 2814 Experts worldwide ranked by ideXlab platform

Yanjun Shen - One of the best experts on this subject based on the ideXlab platform.

  • finite time h control for linear continuous system with norm bounded Disturbance
    Communications in Nonlinear Science and Numerical Simulation, 2009
    Co-Authors: Qingyi Meng, Yanjun Shen
    Abstract:

    Abstract In this paper, the definition of finite-time H ∞ control is presented. The system under consideration is subject to time-varying norm-bounded Exogenous Disturbance. The main aim of this paper is focused on the design a state feedback controller which ensures that the closed-loop system is finite-time bounded (FTB) and reduces the effect of the Disturbance input on the controlled output to a prescribed level. A sufficient condition is presented for the solvability of this problem, which can be reduced to a feasibility problem involving linear matrix inequalities (LMIs). A detailed solving method is proposed for the restricted linear matrix inequalities. Finally, examples are given to show the validity of the methodology.

  • finite time control of discrete time systems with time varying Exogenous Disturbance
    Communications in Nonlinear Science and Numerical Simulation, 2009
    Co-Authors: Lin Zhu, Yanjun Shen
    Abstract:

    Abstract This paper deals with some finite-time control problems for uncertain discrete-time linear systems subject to Exogenous Disturbance. Sufficient conditions are presented for finite-time stabilization via state feedback. These conditions can be reduced to feasibility problems involving linear matrix inequality (LMI). A detailed solving method is proposed for the restricted linear matrix inequalities. Finally, an example illustrates the proposed methodology.

  • finite time control of linear parameter varying systems with norm bounded Exogenous Disturbance
    Journal of Control Theory and Applications, 2008
    Co-Authors: Yanjun Shen
    Abstract:

    In this paper, a new approach is presented for finite-time control problems for linear systems subject to time-varying parametric uncertainties and Exogenous Disturbance. The Disturbance is assumed to be time varying and bounded. Sufficient conditions are obtained for the existence of a linear parameter-dependent state feedback gain, which can ensure that the closed-loop system is finite-time bounded (FTB). The conditions can be reduced to feasibility problems involving LMIs. Numerical examples show the validity of the proposed methodology.

  • stabilize uncertain linear systems under time varying Exogenous Disturbance using finite time control
    International Conference on Mechatronics and Automation, 2007
    Co-Authors: Yanjun Shen
    Abstract:

    In this paper, we consider finite time control problems for uncertain linear systems subject to time-varying Exogenous Disturbances. The main results provided are new sufficient conditions for finite time control problems via state feedback and output feedback. The conditions are then reduced to a feasibility problem involving linear matrix inequalities (LMIs). A numerical example is given which illustrates the proposed methodology in the paper.

Xianping Liu - One of the best experts on this subject based on the ideXlab platform.

  • Consensus of linear multi-agent systems with Exogenous Disturbance generated from heterogeneous exosystems
    International Journal of Systems Science, 2017
    Co-Authors: Xuxi Zhang, Xianping Liu
    Abstract:

    ABSTRACTThis paper addresses the consensus tracking problem for multi-agent linear systems subject to Exogenous Disturbances generated from heterogeneous exosystems. For the case that the Disturbances are generated from linear heterogeneous exosystems, a linear Disturbance observer and distributed control law are proposed, and sufficient condition for consensus tracking is established by combining the input-to-state stability and Lyapunov analysis methods. For the case when the Disturbances are generated from non-linear heterogeneous exosystems, a non-linear Disturbance observer is presented to estimate such Disturbance by using the dynamic gain technique; then, a distributed control law is designed, and sufficient condition is also presented for achieving consensus tracking. Two simulation examples are provided to demonstrate the effectiveness of the proposed consensus protocols.

  • Consensus of Second Order Multi-Agent Systems with Exogenous Disturbance Generated by Unknown Exosystems
    Entropy, 2016
    Co-Authors: Xuxi Zhang, Qidan Zhu, Xianping Liu
    Abstract:

    This paper is concerned with consensus problem of a class of second-order multi-agent systems subjecting to external Disturbance generated from some unknown exosystems. In comparison with the case where the Disturbance is generated from some known exosystems, we need to combine adaptive control and internal model design to deal with the external Disturbance generated from the unknown exosystems. With the help of the internal model, an adaptive protocol is proposed for the consensus problem of the multi-agent systems. Finally, one numerical example is provided to demonstrate the effectiveness of the control design.

  • further results on consensus of second order multi agent systems with Exogenous Disturbance
    IEEE Transactions on Circuits and Systems, 2013
    Co-Authors: Xuxi Zhang, Xianping Liu
    Abstract:

    In this paper, the consensus problem of second-order multi-agent systems with Exogenous Disturbances is investigated. Firstly, by using the input-to-state stability of the systems, we show that the global exponential stability of the estimate error system will lead to the asymptotical consensus of the second-order multi-agent systems with Exogenous Disturbances. Secondly, by utilizing the dynamic gain technique, a Disturbance observer is proposed to estimate the Disturbance generated by nonlinear exosystem. Based on this Disturbance observer, a consensus protocol is presented for the second-order multi-agent systems. Finally, two examples are provided to show the effectiveness of the proposed results.

Xuxi Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Consensus of linear multi-agent systems with Exogenous Disturbance generated from heterogeneous exosystems
    International Journal of Systems Science, 2017
    Co-Authors: Xuxi Zhang, Xianping Liu
    Abstract:

    ABSTRACTThis paper addresses the consensus tracking problem for multi-agent linear systems subject to Exogenous Disturbances generated from heterogeneous exosystems. For the case that the Disturbances are generated from linear heterogeneous exosystems, a linear Disturbance observer and distributed control law are proposed, and sufficient condition for consensus tracking is established by combining the input-to-state stability and Lyapunov analysis methods. For the case when the Disturbances are generated from non-linear heterogeneous exosystems, a non-linear Disturbance observer is presented to estimate such Disturbance by using the dynamic gain technique; then, a distributed control law is designed, and sufficient condition is also presented for achieving consensus tracking. Two simulation examples are provided to demonstrate the effectiveness of the proposed consensus protocols.

  • Consensus of Second Order Multi-Agent Systems with Exogenous Disturbance Generated by Unknown Exosystems
    Entropy, 2016
    Co-Authors: Xuxi Zhang, Qidan Zhu, Xianping Liu
    Abstract:

    This paper is concerned with consensus problem of a class of second-order multi-agent systems subjecting to external Disturbance generated from some unknown exosystems. In comparison with the case where the Disturbance is generated from some known exosystems, we need to combine adaptive control and internal model design to deal with the external Disturbance generated from the unknown exosystems. With the help of the internal model, an adaptive protocol is proposed for the consensus problem of the multi-agent systems. Finally, one numerical example is provided to demonstrate the effectiveness of the control design.

  • further results on consensus of second order multi agent systems with Exogenous Disturbance
    IEEE Transactions on Circuits and Systems, 2013
    Co-Authors: Xuxi Zhang, Xianping Liu
    Abstract:

    In this paper, the consensus problem of second-order multi-agent systems with Exogenous Disturbances is investigated. Firstly, by using the input-to-state stability of the systems, we show that the global exponential stability of the estimate error system will lead to the asymptotical consensus of the second-order multi-agent systems with Exogenous Disturbances. Secondly, by utilizing the dynamic gain technique, a Disturbance observer is proposed to estimate the Disturbance generated by nonlinear exosystem. Based on this Disturbance observer, a consensus protocol is presented for the second-order multi-agent systems. Finally, two examples are provided to show the effectiveness of the proposed results.

Tamer Basar - One of the best experts on this subject based on the ideXlab platform.

  • adaptive controller design for tracking and Disturbance attenuation in parametric strict feedback nonlinear systems
    IEEE Transactions on Automatic Control, 1998
    Co-Authors: Zigang Pan, Tamer Basar
    Abstract:

    The authors develop a systematic procedure for obtaining robust adaptive controllers that achieve asymptotic tracking and Disturbance attenuation for a class of nonlinear systems which are described in the parametric strict-feedback form and are subject to additional Exogenous Disturbance inputs. Their approach to adaptive control is performance-based, where the objective for the controller design is not only to find an adaptive controller, but also to construct an appropriate cost functional, compatible with desired asymptotic tracking and Disturbance attenuation specifications, with respect to which the adaptive controller is "worst case optimal". Three main issues of the paper are: the backstepping methodology, worst case identification schemes, and singular perturbations analysis. Closed-form expressions have been obtained for an adaptive controller and the corresponding value function. A numerical example involving a third-order system is given.

  • adaptive controller design for tracking and Disturbance attenuation in parametric strict feedback nonlinear systems
    IFAC Proceedings Volumes, 1996
    Co-Authors: Zigang Pan, Tamer Basar
    Abstract:

    Abstract We develop a systematic procedure for obtaining robust adaptive controllers that achieve asymptotic tracking and Disturbance attenuation for nonlinear systems in parametric-strict-feedback form and subject to additional Exogenous Disturbance inputs. Our approach is performance based, where the objective is to find not only an adaptive controller, but also an appropriate cost functional, compatible with desired asymptotic tracking and Disturbance attenuation specifications, with respect to which the adaptive controller is "worst-case optimal." Using the backstepping methodology, worst-case identification schemes, and singular perturbations analysis, we obtain closed-form expressions for the solutions of associated Hamilton-Jacobi-Isaacs equations or inequalities, thereby guaranteeing satisfaction of dissipation inequalities for the adaptive controllers.

Liu Hongwei - One of the best experts on this subject based on the ideXlab platform.