Observer-based security control of cyber-physical system under hybrid cyber attacks

Abstract

Abstract: This paper investigates the security control problem for a class of cyber-physical systems under hybrid cyber-attacks. Firstly, considering the influence of hybrid cyber attacks and signal quantization error, a closed-loop model of cyber-physical systems is established by utilizing a dynamic observer-based feedback control method. Secondly, by means of Lyapunov stability theory and stochastic system theory, sufficient conditions are derived for the robust stability of cyber-physical systems. The robust controller satisfying H_∞ performance is obtained by linear matrix inequality technology and singular value decomposition method. Finally, a simulation example is given to verify the correctness and effectiveness of the proposed control method.

Key words: cyber-physical systems, hybrid cyber attacks, dynamic observer, signal quantization, singular value decomposition

CLC Number:

TP273

ZHU Chao-qun, LIU Cheng-fa. Observer-based security control of cyber-physical system under hybrid cyber attacks[J]. Journal of Lanzhou University of Technology, 2025, 51(6): 82-89.

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