Event-triggered H ∞ control for switched systems based on interval observer

The paper studies the design of interval observer-based event-triggered H-infinity controller for switched systems with frequent asynchronism. We first propose an interval observer-based event-triggered mechanism, which is used to transmit the observer states and the activated mode information for controller updating. Then, we design an interval observer-based event-triggered H infinity controller for the considered systems. By using the controller mode-dependent Lyapunov function method, sufficient conditions for the globally exponential stability of the closed-loop switched systems are obtained under average dwell time switching law. Moreover, we prove that the interevent interval length is a positive constant, which can exclude the Zeno behavior. Compared with the literature, the paper removes the strict requirement of at most one switch between two event-triggered instants, that is, frequent switches within an interevent interval are allowed. Finally, a numerical example is given to verify the effectiveness of the proposed method.