Asynchronously switching control of discrete-time switched systems with a Φ-dependent integrated dwell time approach

Abstract

In this paper, the asynchronous control problem is investigated and a multiple convex Lyapunov functions (MCLF) approach is introduced for a class of discrete-time switched linear systems under the $ \Phi $-dependent integrated dwell time ($ \Phi $DIDT) switching strategy. For the problem of asynchronous switching, this paper considers that Lyapunov functions may jump when the subsystem switches or the controller changes. Thus, the constructed MCLF is dependent on both the asynchronous interval and the synchronous interval, and the synchronous interval is divided into the convex interval and non-convex interval parts. Some sufficient conditions of stability with Linear matrix inequality (LMI) forms are obtained, and the asynchronous controller is designed to guarantee the globally uniform exponential stability of the system under study. In addition, the proposed method can degenerate to the existing methods to deal with the asynchronous control problem. Finally, a numerical example illustrates the superiority of the proposed method.

Keywords

• switched systems
• asynchronous control
• globally uniformly exponentially stability
• $ \phi $-dependent integrated dwell time
• multiple convex lyapunov function