Output-Feedback Control in Nonlinear Singular Systems With Exogenous Disturbance Based on State Decomposition Technique
Fang Gao, Wenbin Chen, Min Wu, Jinhua She
Abstract
In this article, a state decomposition technique (SDT) is used to address the output-feedback control challenge for nonlinear singular systems with exogenous disturbance. The objective is to design an output-feedback controller to enhance system performance. First, a disturbance estimator is built to estimate and compensate for the adverse impacts of exogenous disturbance on the system. Second, the closed-loop nonlinear singular system is decomposed into an algebraic subsystem and a differential subsystem based on the SDT. Then, a state decomposition Lyapunov function is designed to obtain a new admissible criterion with fewer decision variables. Third, an output-feedback controller is designed using the admissible criterion and depends on the controller gain's decomposition component. Finally, a comparison between a sliding-mode control and the presented approach through a practical application model demonstrates the practicability and efficacy of the presented approach.