L-infinity event-triggered networked control under time-varying communication delay with communication cost reduction

A novel L-infinity event-triggered networked control scheme under time-varying communication delay is proposed. The control objective is to maintain L-infinity input to state stability while minimizing triggering and communication overhead under uncertainties. The event triggering is asynchronous for satisfying each subsystem performance requirement individually, and the event triggering strategy is adaptive to the variable communication delay to reduce the communication cost without degrade of system performance (input to state stability). The relations between the communication delay and the event triggering conditions are investigated and related bounds are derived analytically. An example of electrical power system frequency control task is used to illustrate the effectiveness of the proposed scheme in terms of achieving identical control performance with lower communication overhead.