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Robust tracking control for switched fuzzy systems with fast switching controller. (English) Zbl 1264.93139

Summary: We address the problem of designing robust tracking controls for a class of switched fuzzy (SF) systems with time delay. A switched fuzzy system, which differs from existing ones, is firstly employed to describe a nonlinear system. Next, a fast switching controller consisting of a number of simple subcontrollers is proposed. The smooth transition is governed by using the fast switching controller. Tracking hybrid control schemes which are based upon a combination of the \(H_{\infty }\) tracking theory, fast switching control algorithm, and switching law design are developed such that the \(H_{\infty }\) model referent tracking performance is guaranteed. Since convex combination techniques are used to derive the delay independent criteria, some subsystems are allowed to be unstable. Finally, various comparisons of the elaborated examples are conducted to demonstrate the effectiveness of the proposed control design approach. All results illustrate good control performances as desired.

MSC:

93C42 Fuzzy control/observation systems
93B51 Design techniques (robust design, computer-aided design, etc.)
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