A Robust Circle-criterion Observer-based Estimator for Discrete-time Nonlinear Systems in the Presence of Sensor Attacks
AuthorYang, T; Murguia, C; Kuijper, M; Nesic, D
Source TitleProceedings of the ... IEEE Conference on Decision & Control / IEEE Control Systems Society. IEEE Conference on Decision & Control
University of Melbourne Author/sNesic, Dragan; Kuijper, Margreta; Yang, Tianci; Murguia Rendon, Carlos
AffiliationElectrical and Electronic Engineering
Document TypeConference Paper
CitationsYang, T., Murguia, C., Kuijper, M. & Nesic, D. (2018). A Robust Circle-criterion Observer-based Estimator for Discrete-time Nonlinear Systems in the Presence of Sensor Attacks. Proceedings of the 57th IEEE Conference on Decision and Control, 2018-December, pp.571-576. IEEE. https://doi.org/10.1109/CDC.2018.8619724.
Access StatusOpen Access
ARC Grant codeARC/DP170104099
We address the problem of robust state estimation and attack isolation for a class of discrete-time nonlinear systems with positive-slope nonlinearities under (potentially unbounded) sensor attacks and measurement noise. We consider the case when a subset of sensors is subject to additive false data injection attacks. Using a bank of circle-criterion observers, each observer leading to an Input-to-State Stable (ISS) estimation error, we propose a estimator that provides robust estimates of the system state in spite of sensor attacks and measurement noise; and an algorithm for detecting and isolating sensor attacks. Our results make use of the ISS property of the observers to check whether the trajectories of observers are consistent with the attack-free trajectories of the system. Simulations results are presented to illustrate the performance of the results.
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