H-infinity PID Control for Discrete-Time Fuzzy Systems with Infinite-Distributed Delays under Round-Robin Communication Protocol

Abstract

This paper is concerned with the H-infinity proportional-integral-derivative (PID) control problem for class of discrete-time Takagi-Sugeno fuzzy systems subject to infinite-distributed time-delays and Round-Robin (RR) protocol scheduling effects. The information exchange between the sensors and the controller is conducted through a shared communication network. For the purpose of alleviating possible data collision, the well-known RR communication protocol is deployed to schedule the data transmissions. To stabilize the target system with guaranteed H-infinity performance index, a novel yet easy-to-implement fuzzy PID controller is developed whose integral term is calculated based on the past measurements defined in a limited time-window with hope to improve computational efficiency and reduce accumulation error. Based on the Lyapunov stability theory and the convex optimization technique, sufficient conditions are derived to ensure the exponential stability as well as the H-infinity disturbance attenuation/rejection capacity of the underlying system. Furthermore, by utilizing the cone complementarity linearization algorithm, the non-convex controller design problem is transformed into an iterative optimization one that facilitates the controller implementation. Finally, simulation examples are given to show the effectiveness and correctness of the developed control method.