Cyber-Attack Detection and Isolation in Event-Based Cyber-Physical Systems

This paper investigates the problem of cyber-attack detection and isolation in cyber-physical systems (CPS). Given the numerous benefits of event-based communication and control, we propose an event-based scheme for communication between the Command and Control (C&C) side and the plant side of the CPS. Our detection approach consists of two filters (one on the plant side and the other on the C&C side) and an Unknown Input Observer (UIO) on the plant side to detect cyber-attacks. An event-based communication channel between the two filters is considered, and we assume that the attacker has complete knowledge of the system's dynamics, filters, and the UIO. Finally, the effectiveness and capabilities of our approach are verified and demonstrated through simulation case studies.