Anti-disturbance control for T-S fuzzy models using fuzzy disturbance modeling

Abstract

In this paper, an anti-disturbance tracking control scheme is proposed for T-S fuzzy models subject to parametric uncertainties and unknown disturbances. Different with those previous results, exogenous disturbances are also described by T-S disturbance models. Under this framework, a composite observer is constructed to estimate the system state and the disturbances simultaneously. Meanwhile, by integrating the PI-type control algorithm with the estimates of the state and the disturbance, a feedback control input is designed to ensure the system stability and the convergence of the tracking error to zero as well as satisfactory disturbance estimation and attenuation performance.