Design of Event-Based Sliding Mode Controller Under Denial of Service Attack

This paper addresses the problem of robust stabilization of linear-time invariant (LTI) systems subjected to periodic denial-of-service (DoS) attacks in the framework of cyber-physical systems (CPSs). A resource-aware sliding-mode control (SMC) strategy using an event-triggered mechanism (ETM) is introduced to deal with external disturbances and DoS. The ETM reduces the network communication demands and computations, while the SMC-based control law is designed to ensure robust system performance under the impact of external disturbances and DoS attacks. Adequate conditions on the ratio of attack durations are derived that guarantee the existence of a practical sliding motion despite the presence of these DoS attacks. Additionally, it is shown that the execution time intervals of the ETM have a positive lower bound, eliminating the occurrence of Zeno behaviours. A satellite control system example is used to illustrate the efficacy of the suggested methodology.