Secure Control for Cyber-Physical Systems under Malicious Attacks

Chengwei Wu, Weiran Yao, Wei Pan, Guanghui Sun, Jianxing Liu, Ligang Wu

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)
52 Downloads (Pure)

Abstract

This article investigates the secure control problem for cyber-physical systems when the malicious data are injected into the cyber realm, which directly connects to the actuators. Based on moving target defense (MTD) and reinforcement learning, we propose a novel proactive and reactive defense control scheme. First, the system (A,B) is modeled as a switching system consisting of several controllable pairs (A,Bl) to facilitate the construction of the MTD control scheme. The controllable pairs (A,Bl) can be altered to update system dynamics under certain unpredictable switching probabilities for each subsystem, which can prevent the adversaries from effective attacks. Second, both attack detection and isolation schemes are designed to accurately locate and exclude the compromised actuators from a switching sequence. Third, a reinforcement learning algorithm based on the zero-sum game theory is proposed to design the defense control scheme when there exist no controllable subsystems to switch. To demonstrate the effectiveness of the defense control scheme, a three-tank system under unknown cyber attacks is illustrated.

Original languageEnglish
Pages (from-to)775-788
JournalIEEE Transactions on Control of Network Systems
Volume9 (2022)
Issue number2
DOIs
Publication statusPublished - 2021

Bibliographical note

Accepted Author Manuscript

Keywords

  • Actuator attacks
  • Actuators
  • Control systems
  • Cyber-physical systems
  • Detectors
  • Heuristic algorithms
  • Moving target defense
  • Proactive and reactive control
  • Reinforcement learning
  • Switches
  • Symmetric matrices
  • System dynamics

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