Modeling and H∞ control of wireless networked control system with both delay and packet loss

This paper investigates the H∞ control problem for a class of wireless networked control system (NCS). Both time delays and packet losses are considered simultaneously in the wireless communication networks. Under some assumptions, a switched system model with time-varying delays is established to describe the closed-loop system, by which the effect of packet losses is dealt differently from time delays. Based on the obtained model, a sufficient condition is proposed to guarantee the closed-loop system stable and ensure a prescribed H∞ performance level. Examples illustrate the effectiveness of the proposed approach.