Composite Fuzzy Control of Nonlinear Singularly Perturbed Systems

  • Authors:
  • T. -H.S. Li;Kuo-Jung Lin

  • Affiliations:
  • Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan;-

  • Venue:
  • IEEE Transactions on Fuzzy Systems
  • Year:
  • 2007

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Abstract

This paper presents the composite fuzzy control to stabilize the nonlinear singularly perturbed (NSP) systems with guaranteed Hinfin control performance. We use the Takagi-Sugeno (T-S) fuzzy model to construct the singularly perturbed fuzzy (SPF) systems. The corresponding fuzzy slow and fast subsystems of the original SPF system are also obtained. At first, a set of common positive-define matrices and the controller gains are determined by the Lyapunov stability theorem and linear matrix inequality (LMI) approach. Then, a sufficient condition is derived for the robust stabilization of NSP systems. The composite fuzzy control will stabilize the original NSP systems for all epsivisin(0,epsiv*) and the allowable perturbation bound epsiv* can be determined via some algebra inequalities. A practice example is adopted to demonstrate the feasibility and effectiveness of the proposed control scheme