Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Volume 56, Issue 9, Pages 739-743Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSII.2009.2027948
Keywords
Discrete-time systems; fuzzy Lyapunov function; H(infinity) filtering; linear matrix inequality (LMI); Takagi-Sugeno (T-S) fuzzy model
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This brief is concerned with the H(infinity) filtering problem for a class of discrete-time fuzzy systems. The objective is to find a new way to design a stable filter guaranteeing the asymptotic stability and a prescribed H(infinity) performance of the filtering error system. By using the fuzzy Lyapunov function approach and adding slack matrix variables, a new condition for H(infinity) performance analysis is proposed. Then, a linear matrix inequality (LMI)-based approach is developed for designing the fuzzy H(infinity) filter, which can be obtained from the solution of convex optimization problems. When these LMIs are feasible, an explicit expression of a desired H(infinity) fuzzy filter is given. Finally, a numerical example is provided to illustrate the effectiveness and less conservatism of the proposed approach.
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