Multi-source Interference Switching Random System Compound Anti-interference Control

Disturbances exist widely in the actual system,which will have a serious impact on the control precision of the system.In order to improve high-precision demands of complex control system,the anti-disturbance control has been a hot topic.In addition,switched stochastic systems have a wide range of practical application background,such as rolling steel,chemical batch processing,intelligent transportation and so on.In this paper,the problem of composite hierarchical anti-disturbance control for switched stochastic systems with multiple disturbances is studied.The main contents are as follows:1)The issue of composite adaptive anti-disturbance control for a class switched stochastic systems with multiple disturbances is studied.Disturbance can be divided into two types.The first is the disturbance generated by the external system,and the second is described by parameterized nonlinear function.The disturbance observer and adaptive law are designed to estimate respec-tively.Then,the estimations are utilized to design the feedback controller to obtain the composite anti-disturbance controller.And some sufficient criterion checking the stability and weighted H_?performance for the closed-loop are obtained via multiple Lyapunov function technique.Finally,two examples are provided to verify the availability of the proposed algorithm.2)The issue of output feedback tracking control for switched stochastic systems with multiple disturbances is studied.A disturbance observer and a state observer based on output information are designed.Composite output feedback tracking controller based on the output of disturbance observer and state observer is constructed.By constructing an appropriate multiple Lyapunov function,the mean square exponential stability of the system and weight H_?tracking control are guaranteed via mode-dependent average dwell time.Furthermore,the sufficient conditions for the solvable gain of the controller and the observer are given by the linear matrix inequality method.Finally,numerical example is given to verify the effectiveness of the proposed control method.3)The issue of composite anti-disturbance feedback passification for switched stochastic time-delay systems with multiple disturbances subject to mode-dependent average dwell time switch-ing.The multiple disturbances are composed of two parts:one is given through an exogenous system and the other is described in the form of norm-bounded vector.A disturbance observer is constructed to estimate exogenous disturbance.Then,a state feedback controller included the estimation values is designed to guarantee the passivity of the closed-loop system.The observer and controller gains are developed via linear matrix inequalities.The effectiveness of the proposed method is verified through a numerical example and an application example to PWM driven boost converter.