Resilient control under denial-of-service via dynamic event triggering

Abstract

Networked control systems (NCS) typically utilize networks of computers and communication links to automatically monitor and manage the plant-sensor-controller-actuator interactions and data exchanges. One important issue in the design of NCS is concerning the reliability and security of the used communication network when there are problems/imperfections which occur due to failures of some components or attacks from malicious adversaries. This paper examines the NCS stability in the presence of a particular communication network problem called denial-of-service (DoS). In essence, a DoS is a form of failure/attack on NCS' communication systems which prevents an ideal implementation of the control inputs to be executed. This paper proposes a resilient control design approach based on a dynamic triggering scheme (DTS) which guarantees the stability of the closed loop NCS in the presence of DoS. The main results of the papers show that the DTS appears to be a more beneficial approach than the previously developed static triggering scheme since the former not only provides an event-triggered implementation scheme with longer inter-sampling interval but is also capable of mitigating DoS with longer (average) duration of occurrences.