ABSTRACT
Event-based control is a new control method that closes the feedback loop only if an event indicates that the control error exceeds a tolerable bound and triggers a data transmission from the sensors to the controllers and the actuators. Event-based control combines feedforward and feedback control in the sense that only at the event times is the feedback loop closed, and between consecutive event times, the control is carried out in an open-loop fashion. In the typical situation considered in event-based control, the communication network is not used exclusively for the control task at hand, but also for other tasks; hence, it may introduce a time delay or even loss of information into the control loop in dependence on the overall data traffic. In comparison to multivariable event-based control, the structural constraints of the control law lead to further difficulties. Event-based control reduces the load of the communication network only if the scheduling of the network is taken into account.
