Abstract
Here, the problem of finite-time disturbance rejection is investigated for a class of MIMO non-linear systems with both unknown external disturbances and actuator saturation in the disturbance-observer-based control (DOBC) framework. In order to expand the application range of external disturbances, Takagi-Sugeno (T-S) fuzzy model is used to describe the complex non-linear disturbance. By constructing an appropriate Lyapunov function, an observer-based controller is designed to guarantee that the closed-loop system is finite-time stable. Finally, a simulation example for A4D flight control systems with non-linear disturbances is given to demonstrate the effectiveness of the proposed approach.
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