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Sliding Mode Control for Robust Stabilization of

Young-Hoon Roh/Jun-Ho Oh
Transaction on Control Automation, and Systems Engineering, vol. 2, no. 2, pp.98-103, 2000

Abstract : This paper is concerned with a delay-dependent sliding mode scheme for the robust stabilization of input-delay systems with bounded unknown uncertainties. A sliding surface based on a predictor is proposed to minimize the effect of the input delay. Then, a robust control law is derived to ensure the existence of a sliding mode on the surface. In input-delay systems, uncertainties given during the delayed time are not directly controlled by the switching control because of causality problem of them. They can influence the stability of the system in the sliding mode. Hence, a delay-dependent stability analysis for reduced order dynamics is employed to estimate maximum delay bound such that the system is globally asymptotically stable in the sliding mode. A numerical example is given to illustrate the design procedure.

Keyword : uncertain input-delayed systems, sliding mode control, delay-dependent stability, robust stabilization, predictor-based control

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