Observer-Based Fuzzy Sliding Mode Control Of Nonlinear Uncertain Systems With Time Delay And Dead-Zone Input

The paper deals with the problem of observer-based fuzzy sliding mode control for nonlinear systems with state time-delays and unknown dead-zone input. To tackle these nonlinear systems, the fuzzy logic systems and adaptive laws are applied to approximate the unknown system functions and estimate unknown parameters, respectively. To accurately estimate the states which are not available, the observer based on state variable filters is constructed. In order to design the controller, a sliding mode control based on sliding surface is utilized. The proposed controller ensures the stability of the whole closed-loop systems according to the Lyapunov stability theorem. Finally, a simulation example is illustrated to demonstrate the effectiveness of this proposed control method.

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