Fractional Exponent-Based Looped-Lyapunov Functional for Mode-Dependent Sampled-Data Control of T–S Fuzzy Markovian Jump Systems With $\mathscr {H}_{\infty }$ Performance
Karpagavalli Sundararajan, N. Padmaja, Tae-Hee Lee, S. Lakshmanan · IEEE Transactions on Fuzzy Systems · 2025
In this article, a novel fractional exponent (FE)-based looped-Lyapunov functional (FEBLLF) is proposed to analyze the stochastic stability (SS) criteria of a nonlinear Markovian jump systems (MJSs) under a mode-dependent sampled-data control through the Takagi–Sugeno (T–S) fuzzy approach. An FE, represented by an exponential function with a fractional parameter, is introduced to define looped FEs (LFEs)$ ({\mathsf {1-e}}^{-\hat{\upalpha} (\upepsilon_{1}(\mathsf{t}))})$and$ ({\mathsf {1-e}}^{-\hat{\upalpha}(\upepsilon_{2}(\mathsf{t}))})$, where$ \upepsilon_{1}(\mathsf {t})= {{\mathsf{t}}-{{\mathsf{t}}_{\mathsf{k}}}},$$\boldsymbol {\upepsilon_{2}} {(\mathsf {t})= {{{\mathsf{t}}_{\mathsf{k+1}}}-{\mathsf{t}}},} {\hat{\boldsymbol{\upalpha}} \in (0,1)}$. These LFEs are utilized to construct a novel FEBLLF and to partition the sampling interval into four distinct sampling subintervals, providing detailed information about the state within each subinterval. Subsequently, the sampling-dependent sufficient conditions are obtained as linear matrix inequalities to ensure the SS of the T–S fuzzy MJSs with$\mathscr {H}_{\infty }$performance level$\upgamma$and to verify the effectiveness of the proposed results, a nonlinear mass–spring system is assessed. In addition, comparative examples are discussed to illustrate the better conservative results of the proposed approaches.