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Sensors 2018, 18(2), 321;

Simultaneous Event-Triggered Fault Detection and Estimation for Stochastic Systems Subject to Deception Attacks

Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education), Jiangnan University, Wuxi 214122, China
School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Author to whom correspondence should be addressed.
Received: 24 December 2017 / Revised: 19 January 2018 / Accepted: 21 January 2018 / Published: 23 January 2018
(This article belongs to the Special Issue Sensors for Fault Detection)
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In this paper, a synthesized design of fault-detection filter and fault estimator is considered for a class of discrete-time stochastic systems in the framework of event-triggered transmission scheme subject to unknown disturbances and deception attacks. A random variable obeying the Bernoulli distribution is employed to characterize the phenomena of the randomly occurring deception attacks. To achieve a fault-detection residual is only sensitive to faults while robust to disturbances, a coordinate transformation approach is exploited. This approach can transform the considered system into two subsystems and the unknown disturbances are removed from one of the subsystems. The gain of fault-detection filter is derived by minimizing an upper bound of filter error covariance. Meanwhile, system faults can be reconstructed by the remote fault estimator. An recursive approach is developed to obtain fault estimator gains as well as guarantee the fault estimator performance. Furthermore, the corresponding event-triggered sensor data transmission scheme is also presented for improving working-life of the wireless sensor node when measurement information are aperiodically transmitted. Finally, a scaled version of an industrial system consisting of local PC, remote estimator and wireless sensor node is used to experimentally evaluate the proposed theoretical results. In particular, a novel fault-alarming strategy is proposed so that the real-time capacity of fault-detection is guaranteed when the event condition is triggered. View Full-Text
Keywords: fault detection and estimation; event-triggered transmission scheme; coordinate transformation fault detection and estimation; event-triggered transmission scheme; coordinate transformation

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Li, Y.; Wu, Q.; Peng, L. Simultaneous Event-Triggered Fault Detection and Estimation for Stochastic Systems Subject to Deception Attacks. Sensors 2018, 18, 321.

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