A Passivity-Based Self-Triggered Strategy for Cyber Physical Systems under Denial-of-Service Attack

Networked control systems are vulnerable to adversarial attacks, such as Denial-of-Service (DoS) attacks, which intend to jam control channels and hence degrade system performance. In this paper, we design a passivity-based mechanism that preserves the security level and control performance under time-varying delays and control packets dropouts. We develop a switching controller framework over an imperfect network and present a class of self-triggered feedback control laws to mitigate DoS attacks with local information. By deducing the maximal tolerant period of each attack, the QSR-dissipativity and hence L-2 stability is preserved under the proposed triggering conditions.