Frequent Asynchronous Switching of Networked Switched Systems Under Event-Triggered Fault-Tolerant Control and DoS Attacks
针对网络化切换系统中频繁切换、拒绝服务攻击、传输延迟和执行器故障共存导致的异步问题，提出了一种弹性事件触发容错控制策略，通过分类关键时刻并构建李雅普诺夫函数统一分析异步行为，保证全局指数稳定性和H∞性能，并在四分之一车辆悬架系统上验证了有效性。
The stability analysis of networked switched systems becomes highly challenging when multiple factors-such as frequent switching, denial-of-service (DoS) attacks, transmission delays, and actuator faults-coexist under an event-triggered mechanism (ETM). These intertwined factors cause complex timing mismatches that invalidate most synchronization-based control frameworks. To address this challenge, this article proposes a resilient event-triggered fault-tolerant control strategy that captures multisource asynchrony by classifying multiple key instants and modeling their interactions through a Lyapunov-based scheme. Unlike most existing studies that rely on synchronized switching assumptions or oversimplify the timing structure by ignoring delays and DoS attacks, this work explicitly incorporates these asynchronous phenomena into a unified analytical framework. First, to ensure timely packet transmission, a hybrid ETM is designed by combining time-triggering and event-triggering conditions. A switched Lyapunov function is then constructed by classifying different intervals, thereby unifying the analysis of asynchronous behaviors and DoS-induced disruptions. Furthermore, a resilient codesign strategy is developed, where the event-triggered parameters and fault-tolerant control gains are jointly designed under an explicit trade-off among the average dwell time parameter of switching signals, DoS attack parameters, and the sampling period. Under the proposed framework, global exponential stability with $H_{\infty } $ performance is guaranteed despite the presence of transmission delays, actuator faults, and DoS attacks. Finally, the effectiveness of the proposed method is demonstrated using a quarter-vehicle suspension system.