Observer-Based Active Control Strategy for Networked Switched Systems against Two-Channel Asynchronous DoS Attacks

This paper addresses the security issue of networked switched systems under two-channel asynchronous denial-of-service (DoS) attacks, where measurement channel and control are subject to DoS attacks independently. For case partial-state measurements, an observer-based active strategy is proposed mitigate negative impact on performance stability system caused by attacks. In this strategy, a novel mode-dependent finite-time observer designed estimate state rapidly accurately, predictor buffer ensure that signals transmitted actuator can be updated even when blocked. Compared earlier results only consider full-state measurements assume followed specific patterns, our work limits frequency duration signals, which more general challenging. Furthermore, switching signal input-to-state (ISS) with behaviors. Finally, effectiveness merits validated through example comparative experiment.