Stabilization of Discrete-time Fuzzy Systems Via Delta Operators and its Application to Truck-Trailer Model

摘要

This paper addresses the problem of robust control in delta domain for a class of Takagi-Sugeno (TS) fuzzy systems with interval time-varying delays and disturbance input. In particular, the system under study involves state time delay, uncertainties and fast sampling period . The main aim of this work was to design a controller such that the proposed TS fuzzy system is robustly asymptotically stable with a prescribed performance level . Based on the proper Lyapunov-Krasovskii functional (LKF) involving lower and upper bound of time delay and free-weighting technique, a new set of delay-dependent sufficient conditions in terms of linear matrix inequalities (LMIs) are established for obtaining the required result. The result reveals that the asymptotic stability is achieved quickly when the sampling frequency is high. Finally, a numerical example based on the truck-trailer model is given to demonstrate the effectiveness and potential of the proposed design technique.