Distributed event-triggered secure consensus control of switched linear multi-agent systems subject to multi-channel DoS attacks

This paper addresses the secure consensus problem for linear switched multi-agent systems (MASs) under multi-channel denial-of-service (DoS) attacks, where both dual switching dynamics arising from agent dynamics and attack-induced topology changes and dual asynchrony caused by event-triggered mechanisms and attack-blocked switching signals are considered. Three distinct attack modes are defined to characterize the topological features of the attack channels, with their impacts rigorously analyzed through attack mode-dependent multiple Lyapunov functions. To tackle the dual asynchrony, we propose a novel distributed event-triggered control mechanism with agent-specific triggering thresholds that significantly reduces unnecessary triggering while preventing Zeno behavior. The developed attack mode-dependent switched controller dynamically adapts to varying attack patterns, significantly reducing conservatism compared to conventional static-gain approaches. Furthermore, an average dwell time (ADT)-based switching law is established to explicitly quantify the trade-offs among attack frequency, duration, and maximum triggering intervals. Theoretical analysis provides sufficient conditions for achieving secure consensus under dual switching and asynchronism, with the effectiveness of the proposed approach demonstrated through numerical simulations.