1 research outputs found
An Observer-based Switching Algorithm for Safety under Sensor Denial-of-Service Attacks
The design of safe-critical control algorithms for systems under
Denial-of-Service (DoS) attacks on the system output is studied in this work.
We aim to address scenarios where attack-mitigation approaches are not
feasible, and the system needs to maintain safety under adversarial attacks. We
propose an attack-recovery strategy by designing a switching observer and
characterizing bounds in the error of a state estimation scheme by specifying
tolerable limits on the time length of attacks. Then, we propose a switching
control algorithm that renders forward invariant a set for the observer. Thus,
by satisfying the error bounds of the state estimation, we guarantee that the
safe set is rendered conditionally invariant with respect to a set of initial
conditions. A numerical example illustrates the efficacy of the approach.Comment: Accepted at the 2023 American Control Conference (ACC