An unknown input multi-observer approach for estimation, attack isolation, and control of lti systems under actuator attacks
T Yang, C Murguia, M Kuijper, D Nesic
Proceedings of the 2019 18th European Control Conference (ECC) | IEEE | Published : 2019
We address the problem of state estimation, attack isolation, and control for discrete-time Linear Time Invariant (LTI) systems under (potentially unbounded) actuator false data injection attacks. Using a bank of Unknown Input Observers (UIOs), each observer leading to an exponentially stable estimation error in the attack-free case, we propose an estimator that provides exponential estimates of the system state and the attack signals when a sufficiently small number of actuators are attacked. We use these estimates to control the system and isolate actuator attacks. Simulations results are presented to illustrate the performance of the results.
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Awarded by Australian Research Council
This work was supported by the Australian Research Council under the Discovery Project DP170104099.