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ISA Trans. 2014 May;53(3):679-89. doi: 10.1016/j.isatra.2014.01.008. Epub 2014 Mar 14.

Composite fuzzy sliding mode control of nonlinear singularly perturbed systems.

Author information

1
Department of Instrumentation Engineering, M.B.E. Society׳s, College of Engineering, Ambajogai 431517, India.
2
Department of Instrumentation Engineering, SGGS Institute of Engineering and Technology, Vishnupuri, Nanded 431606, India. Electronic address: bmpatre@ieee.org.

Abstract

This paper deals with the robust asymptotic stabilization for a class of nonlinear singularly perturbed systems using the fuzzy sliding mode control technique. In the proposed approach the original system is decomposed into two subsystems as slow and fast models by the singularly perturbed method. The composite fuzzy sliding mode controller is designed for stabilizing the full order system by combining separately designed slow and fast fuzzy sliding mode controllers. The two-time scale design approach minimizes the effect of boundary layer system on the full order system. A stability analysis allows us to provide sufficient conditions for the asymptotic stability of the full order closed-loop system. The simulation results show improved system performance of the proposed controller as compared to existing methods. The experimentation results validate the effectiveness of the proposed controller.

KEYWORDS:

Composite fuzzy sliding mode control; Composite sliding mode control; Fuzzy sliding mode control; Nonlinear singularly perturbed system

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