Dual-Channel Event-Triggered Output Feedback Control for Linear System with Unavailable States

In this technical note, the problem of event-triggered output-feedback control is considered for a linear system whose states are unavailable or partial available. In order to realize the reduction of communication in both the sensor to controller(S-C) and the controller to actuator(C-A) channels, a piecewise linear model is introduced, by which the communication in dual channels can be simultaneously considered. For S-C channel, the event-triggered strategy based on the observer is applied. For C-A channel, classical fixed threshold, relative threshold strategy and switching threshold strategy which combines the benefits of the first two mechanisms are discussed respectively. It is shown that the proposed event-triggered scheme can realize the reduction of communication while guaranteeing the stability of the system. The simulation results also confirm the superiority of switching threshold strategy.