Quantization and Event-Triggered Policy Design for Encrypted Networked Control

doi:10.1109/JAS.2023.124101

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	Quantization and Event-Triggered Policy Design for Encrypted Networked Control
	Yongxia Shi; Ehsan Nekouei
发表期刊	IEEE/CAA Journal of Automatica Sinica
ISSN	2329-9266
	2024
卷号	11 期号:4 页码:946-955
摘要	This paper proposes a novel event-driven encrypted control framework for linear networked control systems (NCSs), which relies on two modified uniform quantization policies, the Paillier cryptosystem, and an event-triggered strategy. Due to the fact that only integers can work in the Pailler cryptosystem, both the real-valued control gain and system state need to be first quantized before encryption. This is dramatically different from the existing quantized control methods, where only the quantization of a single value, e.g., the control input or the system state, is considered. To handle this issue, static and dynamic quantization policies are presented, which achieve the desired integer conversions and guarantee asymptotic convergence of the quantized system state to the equilibrium. Then, the quantized system state is encrypted and sent to the controller when the triggering condition, specified by a state-based event-triggered strategy, is satisfied. By doing so, not only the security and confidentiality of data transmitted over the communication network are protected, but also the ciphertext expansion phenomenon can be relieved. Additionally, by tactfully designing the quantization sensitivities and triggering error, the proposed event-driven encrypted control framework ensures the asymptotic stability of the overall closed-loop system. Finally, a simulation example of the secure motion control for an inverted pendulum cart system is presented to evaluate the effectiveness of the theoretical results.
关键词	Cyber-security encrypted control event-triggered control (ETC) networked control systems (NCSs) semi-homomorphic encryption
DOI	10.1109/JAS.2023.124101
引用统计
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/55368
专题	学术期刊_IEEE/CAA Journal of Automatica Sinica
推荐引用方式 GB/T 7714	Yongxia Shi,Ehsan Nekouei. Quantization and Event-Triggered Policy Design for Encrypted Networked Control[J]. IEEE/CAA Journal of Automatica Sinica,2024,11(4):946-955.
APA	Yongxia Shi,&Ehsan Nekouei.(2024).Quantization and Event-Triggered Policy Design for Encrypted Networked Control.IEEE/CAA Journal of Automatica Sinica,11(4),946-955.
MLA	Yongxia Shi,et al."Quantization and Event-Triggered Policy Design for Encrypted Networked Control".IEEE/CAA Journal of Automatica Sinica 11.4(2024):946-955.

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