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Recently the control of hybrid system has attracted many research efforts. However, few studies have been made on hybrid systems with unknown parameters. In this paper, adaptive controller design is explored for a class of hybrid systems called piecewise linear systems, based on the concept of the polynomial constraints which can decouple the model parameters from the inference of the discrete state...
This paper studies the guaranteed cost control for a class of uncertain switched singular systems based on the guaranteed cost control theories and other related theories about switched systems. Firstly by using the common Lyapunov functions method, a sufficient condition on the existence of state feedback guaranteed cost controller is derived under arbitrary switching laws. Secondly a sufficient...
The Hinfin control problem is studied in this paper for networked control systems (NCSs) with short time-varying delays. By considering state feedback controllers, the closed-loop NCS is described as a discrete-time linear uncertain system model, and the uncertain part reflects the effect of the variation nature of the network-induced delays on the system dynamics. Then, a sufficient condition is...
This paper is concerned with the estimation of the domain of attraction for a class of linear continuous-time systems subject to both interval time-varying delay and actuator saturation. A new type of delay-range-dependent condition is firstly proposed using the free-weighting matrix technique to derive a tighter upper bound on the derivative of a Lyapunov-Krasovskii functional. Based on it, a state...
A small UAV is being developed in the Faculty of Mechanical and Aerospace Enginnering, ITB, Indonesia. The UAV system is designed for surveillance missions in a rural area. The limitation of payload space, weight, and power source demands the system to be designed with limited application of sensors and actuators, while it is still required to be able to perform its mission within a predefined measures...
This paper deals with the problem of dissipative control for a class of Ito-type stochastic systems with time varying delays. We consider the design of a state-feedback dissipative controller based on Lyapunov-Krasovskii functional approach such that the closed-loop systems is exponentially stable in the mean square and strictly (Q, S,R)-dissipative. The sufficient conditions are obtained by using...
In this paper a novel control strategy, the active disturbance rejection control (ADRC) is applied to the trajectory tracking design of ball and plate system. In the ADRC framework, the disturbance and coupling are treated as an additional state variable, which is then estimated and compensated for in real time. In addition, the using of a new nonlinear state error feedback control law in the ADRC...
This paper investigates the problem of robust Hinfin control for Markovian jump systems with polytopic uncertain parameters and mode-dependent distributed delays. In terms of linear matrix inequalities, a sufficient condition for robust stochastic stability is proposed. A state feedback controller is designed such that the closed-loop system is stochastically stable and a prescribed Hinfin performance...
This paper investigates the problem of global robust stabilization by state feedback, for a family of high order feedforward (upper-triangular) nonlinear systems with delayed input. The uncertain nonlinearities are assumed to satisfy a polynomial growth assumption with a constant growth rate. The designed controllers, which are continuous but not smooth feedbacks, could achieve global asymptotical...
In this paper, a state feedback gain synthesis method for achieving alpha-stability of uncertain linear time-delay systems is proposed. By properly incorporating the system dynamics, the derived gain synthesis conditions are totally LMI-based and easy to apply. Examples are given to show the effectiveness of the proposed method.
Suppose an unknown or only partially identified plant is operating with a known linear controller in a closed-loop, and the use of a known nonlinear controller appears attractive to replace the existing controller, on the basis of limited knowledge of the plant. We apply our novel data-based verification tests for ensuring that the introduction of the new nonlinear controller will stabilize the true...
This paper discusses robust stability and stabilization of uncertain discrete-time fuzzy systems that have time-varying delay in state. There have been only a few results on stability and stabilization for discrete-time fuzzy time-delay systems. Especially, few results on robust stability and stabilization for a class of uncertain discrete-time fuzzy time-delay systems have appeared in the literature...
In this paper, the problems of passivity analysis and passive control of continuous-time Takagi-Sugeno (T-S) fuzzy time-varying delayed systems are studied. The analysis is based on the concept of very-strict passivity which is shown to be restrictive than the usual passivity. Novel techniques are applied to derive delay-dependent conditions for the solvability of the problem of designing a state-feedback...
In this paper, passive uncertainties are introduced and we deal with the robust dissipative control problem for a class of singular systems, and then provides the sufficient conditions to design the dissipative controller for uncertain singular systems, whose uncertainties are passive. Finally numerical example is provided to show the usefulness and the feasibility of the present approach.
Networked control system (NCS) is a newly emerging topic within control theory community. In this paper we pay particular attention to the problem concerning data rate constraint. Motivated by many successful results in related research, we study the lowest data rate needed to stabilize an LTI system when the controller structure is limited to be a static state feedback and the channel is modeled...
Computationally efficient robust model predictive control algorithm applicable for linear systems with polytopic model uncertainty as well as bounded additive disturbances is explored. A form of control scheme consisting of a static state feedback and a dynamically evolving perturbation is used in such a way that the cost function can be minimized in a receding horizon fashion over a pre-determined...
Given a periodic reference signal or disturbance, repetitive control is a special control scheme to reduce a tracking error effectively by the periodic signal generator in the repetitive controller. In general, a repetitive controller is added on the existing feedback control system to improve the tracking performance. However, the repetitive controller has been designed without utilizing the information...
This paper deals with design of a nonlinear adaptive state feedback controller for a permanent magnet synchronous motor (PMSM). We firstly present an exact model knowledge controller that ensures the exponentially tracking of a time-varying velocity profile and after this, it is modified to an adaptive controller that satisfies the velocity tracking error signal converges to zero with small control...
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