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Error Reduction of Sliding Mode Control Using Sigmoid-Type Nonlinear Interpolation in the Boundary Layer

Yoo-Kyung Kim and Gi Joon Jeon
International Journal of Control, Automation, and Systems, vol. 2, no. 4, pp.523-529, 2004

Abstract : Sliding mode control with nonlinear interpolation in the boundary layer is proposed. A modified sigmoid function is used for nonlinear interpolation in the boundary layer and its parameter is tuned by a fuzzy controller. The fuzzy controller that takes both the sliding variable and a measure of chattering as its inputs tunes the parameter of the modified sigmoid function. Owing to the decreased thickness of the boundary layer and the tuned parameter, the proposed method has superior tracking performance than the conventional linear interpolation method.

Keyword : Boundary layer, fuzzy controller, modified sigmoid function, sliding mode control.

 
 
 
 
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