Security Control of Switched T-S Fuzzy Systems Under Denial-of-Service Attacks

This paper addresses the security control problem of switched Takagi-Sugeno (T-S) fuzzy systems subject to denial-of-service (DoS) attacks. Accounting for the joint influence of DoS attack duration and frequency constraints, a novel hybrid control scheme is proposed by integrating a newly designed event-triggered mechanism, which significantly alleviates communication load and facilitates aperiodic control updates. Leveraging multiple Lyapunov functions tailored to switching signals, sufficient stability conditions are established for the underlying switched T-S fuzzy systems. Meanwhile, a co-design framework is proposed for the joint tuning of event-triggering parameters and controller gains, where the maximum allowable dwell time is precomputed offline. Moreover, a strictly positive lower bound on the inter-event time is derived to guarantee the exclusion of Zeno behavior. Finally, the effectiveness and practical applicability of the proposed control framework are demonstrated through two practical examples.