1. Robust anti-windup controller design of time-delay fuzzy systems with actuator saturations
- Author
-
Chen-Sheng Ting and Yong-Nong Chang
- Subjects
Controller design ,Mathematical optimization ,Information Systems and Management ,Fuzzy control system ,Fuzzy logic ,Computer Science Applications ,Theoretical Computer Science ,System dynamics ,Nonlinear system ,Artificial Intelligence ,Control and Systems Engineering ,Control theory ,Convex optimization ,Engineering design process ,Actuator ,Software ,Mathematics - Abstract
This study presents a robust anti-windup fuzzy control approach for uncertain nonlinear time-delay systems with actuator saturations. The discussed system dynamics is presented by the Takagi-Sugeno (T-S) fuzzy model. To facilitate the design process, the nonlinearity of input saturation is characterized by a specific sector condition. Given a stabilizing dynamic output feedback fuzzy controller, an anti-windup control approach is then developed to maximize the size of estimate of the domain of attraction. Significantly, the convergence of all admissible initial states within this region could be ensured. Based on the Lyapunov-Krasovskii delay-independent and delay-dependent analyses, sufficient conditions for the robust stabilization are derived. These conditions are formulated as a convex optimization problem with constraints represented by a set of linear matrix inequalities, allowing the fuzzy controller to be synthesized more efficiently. Finally, numeric simulations are given to validate the proposed approach.
- Published
- 2011