Attack Detection for Cyber-Physical Systems: A Zonotopic Approach

• 成果类型: Article
• 署名作者: Li, Jitao; Wang, Zhenhua; Shen, Yi; Xie, Lihua
• 署名单位: Harbin Institute of Technology; Harbin Engineering University; Nanyang Technological University
• 刊物名称: IEEE TRANSACTIONS ON AUTOMATIC CONTROL
• ISSN/ISSBN: 0018-9286
• DOI: 10.1109/TAC.2023.3240383
• 发表日期: 2023
• 页码: 6828-6835
• 关键词: Attack detection; Cyber-physical system (CPS); reachability analysis; zonotope.

摘要

This article studies the problem of sensor attack detection for a class of cyber-physical systems with bounded perturbations. A novel attack detection method is proposed based on zonotopic reachability analysis. A false data injection attack is detected if there is no intersection between the predicted state set and the measurement state set. These sets are online calculated via zonotopic segments minimization. Two approaches, namely, projection and polytopic conversion, are presented to check the intersection situation. The detection performance is quantified using a stealthy attack set and the corresponding state estimation error set. Further, we consider replay attacks. To detect a replay attack, a watermark signal-based active detection mechanism is introduced. Numerical simulations are conducted to demonstrate the validity of the proposed method.