Observed-Mode-Dependent Nonfragile Control of Networked Control Systems Under Hidden DoS Attacks

• Published in: IEEE transactions on control of network systems Vol. 11; no. 1; pp. 139 - 149
• Main Authors: Jiao, Shiyu, Xu, Shengyuan
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.03.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Channels; Closed loops; Communication channels; Control systems; Control systems design; Denial of service attacks; Denial-of-service (DoS) attacks; Denial-of-service attack; Feedback control; hidden semi-Markov jump systems (S-MJSs); Jamming; Liapunov functions; Loss measurement; Markov chains; Markov processes; Mass-spring-damper systems; Network control; networked control systems (NCSs); nonfragile control; Stochastic processes; Switches; Unmanned ground vehicles
• ISSN: 2325-5870; 2372-2533
• DOI: 10.1109/TCNS.2023.3272824

This article develops a methodology on observed-mode-dependent nonfragile control for networked control systems subject to denial-of-service (DoS) attacks, which takes the strong concealment of attack behavior into account. To describe complex switching phenomenon between different forms of attacks that the adversary may launch on communication channels, the semi-Markov chain (SMC) is introduced. DoS attacks with a stealth characteristic are analyzed from a hidden semi-Markov jump systems perspective by constructing a double-layer stochastic process consisting of an SMC and an observed mode sequence. With the aid of emission probability, an observed-mode-dependent nonfragile controller is designed, which can still stabilize the system even if actual attack modes are unavailable. By utilizing the Lyapunov function that depends on actual attack modes and observed ones, sufficient conditions to ensure the <inline-formula><tex-math notation="LaTeX">\delta</tex-math></inline-formula>-error mean square stability of the closed-loop system is deduced. Eventually, a simulation related to the mass-spring-damper system with a single channel and an example of the unmanned ground vehicle with two channels are studied, both of which demonstrate the feasibility and validity.