Finite time attack detection and supervised secure state estimation for CPSs with malicious adversaries

State Estimation and Event‐Triggered Control for Cyber‐Physical Systems under Malicious Attack

“…Remark 5. Similar to reference [16], the states of x 1 and x 4 and their estimates are related to the initial state of the system and the initial state of the observer. Because the designed observer in this paper is nite time, the estimates are irregular before 0.5 s. In addition, the initial state of the system and the initial state of the observer have no e ect on the nal results, and we can change the initial state to adjust the estimates.…”

“…However, based on this, the attack η(t) added to the model in this manuscript and the complexity is not increased. So the system is more conservative than the system in references [16] and [28].…”

“…is requires a specified finite-time estimate. Although Ao et al [16] introduced two concepts of elastic observability index and sparse index of the system and designed a finite-time state observer with state correction, the actuator attack is not taken into account. us, studying the finite-time state estimate under actuator attack is meaningful.…”

“…(1) Inspired by Ao et al in [16], we have proposed a finite-time observer to estimate the state of the system with actuator attacks. Ao et al [16] studied the state estimation of systems against sensor attacks, while this article focuses on actuator attacks.…”

“…(1) Inspired by Ao et al in [16], we have proposed a finite-time observer to estimate the state of the system with actuator attacks. Ao et al [16] studied the state estimation of systems against sensor attacks, while this article focuses on actuator attacks. (2) Inspired by the study of Zhang and Feng in reference [28], considering the resource constraints of the system, event-triggered control is introduced into the attacked cyber-physical system.…”