ABSTRACT

This chapter deals with an example of a control application, which is realized as an event-triggered system and as a time-triggered system in order to experimentally compare the respective behaviors. The temporal behavior of a time-triggered communication network is controlled solely by the progression of time. Likewise, time-triggered operating systems perform scheduling decisions at predefined points in time according to schedule tables. Event-triggered systems, on the other hand, initiate activities whenever significant events occur. In an event-triggered system, however, which manages the resources dynamically, it must be ensured that even at the critical instant, that is, when all components request the resources at the same instant, the specified timeliness of all resource requests can be satisfied. Hard real-time systems must guarantee bounded response times even in the case of peak load and fault scenarios. Many control applications are real-time systems, where the achievement of control stability and safety depends on the completion of activities in bounded time.