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Stability Analysis of Discrete-Time Fuzzy Dynamic Systems Based on Piecewise Lyapunov Functions

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    Abstract

    This paper presents a stability analysis method for discrete-time Takagi-Sugeno fuzzy dynamic systems based on a piecewise smooth Lyapunov function. It is shown that the stability of the fuzzy dynamic system can be established if a piecewise Lyapunov function can be constructed, and moreover, the function can be obtained by solving a set of linear matrix inequalities that is numerically feasible with commercially available software. It is also demonstrated via numerical examples that the stability result based on the piecewise quadratic Lyapunov functions is less conservative than that based on the common quadratic Lyapunov functions.
    Original languageEnglish
    Pages (from-to)22-28
    JournalIEEE Transactions on Fuzzy Systems
    Volume12
    Issue number1
    DOIs
    Publication statusPublished - Feb 2004

    Research Keywords

    • Discrete-time systems
    • Fuzzy dynamic systems
    • Linear matrix inequality (LMI)
    • Piecewise Lyapunov functions
    • Stability

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