Resilient event triggered systems with limited communication

Abstract

A resilient control system is one that maintains state awareness and an accepted level of operational normalcy in response to unexpected disturbances. There has recently been great interest in event-triggered control for networked systems. It is unclear, however, whether event-triggering is appropriate for resilient control because of the sporadic nature of the feedback. This paper examines the bit-rates needed to realize event-triggered systems that are resilient to transient faults. Using techniques from dynamically quantized control, we derive sufficient resilient bit-rates for nonlinear scalar systems with affine controls and disturbances. For linear systems, these sufficient rates are necessary for stabilizability. The results in this paper suggest that, at least for transient faults, resilient control is indeed achievable using event-triggered feedback.