Decentralized Event-Triggered Control Strategy in Distributed Networked Systems with Delays

Event-triggered control strategies have been recently proposed as alternatives to traditional time-triggered periodic sampling for feedback control systems. This paper studies the event-triggered control problem for distributed networked control systems (NCS). In order to reduce the network traffic and the resource of computation, we propose a new decentralized event-triggered scheme for the NCS, where a subsystem broadcast its state information to its neighbors only when the subsystem's local state error exceeds a threshold with on-line adaption. The asymptotic stability of the resulting closed-loop system is guaranteed by the event-triggered feedback scheme. In addition, the paper gives the maximal allowable positive bounds on transmission delays for the networked control systems. Finally, the results are illustrated to be efficient by one simulated example.