Journal
INFORMATION SCIENCES
Volume 420, Issue -, Pages 96-109Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2017.08.057
Keywords
Cyber-physical systems; Actuator and sensor attacks; Event-triggered scheme; Secure observer-based controller
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Funding
- National Natural Science Foundation of China [61621004, 61420106016]
- Research Fund of State Key Laboratory of Synthetical Automation for Process Industries [2013ZCX01]
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This paper investigates the problem of event-triggered secure observer-based control for continuous-time cyber-physical systems (CPSs) under actuator and sensor attacks. Under event-triggered scheme, the original plant is augmented into a discrete-time system, where the states and attacks are assembled into the state vector of the new system. Then, based on the augmented system, a discrete-time secure observer is presented to estimate the states and attacks. Besides, a novel secure observer-based controller, where the actuator attack estimations are utilized to neutralize the actuator attacks, is proposed. A cone complementarity linearization (CCL) algorithm is provided to co-design the desired observer and controller. It is shown that using the proposed secure observer-based controller, the states of the original plant converge to a small neighborhood of the origin despite attacks. Finally, an illustrative example Is given to show the effectiveness of the proposed methods. (C) 2017 Elsevier Inc. All rights reserved.
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