Abstract: This paper deals with the design problem of fuzzy robust tracking control for a class of uncertain nonlinear systems. The uncertain no nlinear systems descriptor based on T-S fuzzy model with external disturbance was considered, the tracking error of the controlled system following the reference signal was studied, and the constraint conditions of the tracking error’s exponential stability were obtained. Under the coherence of tracking control and stabilization control, the design techniques of H_∞fuzzy robust tracking controller were studied, which can be solved by using LMI and FLC tools of Matlab.The simulation results demonstrate the effectivity of the proposed method.

Key words: T-S fuzzy model, uncertain nonlinear systems, tracki ng control, H_∞ index