Control of hybrid systems based on net state models

Technical processes characterized by the interaction of time-driven and event-driven dynamics are referred to as hybrid systems. During start-up procedures or batch processes a technical plant has to be guided along certain operating points. Thus, the basic control task is to lead the system trajectory from an initial to a target state. To cover a series of operating points, this task is to be carried out repeatedly. A modeling formalism for the representation of hybrid systems is the socalled Net State Model. Based on this model type we propose the structure of a hybrid control system as well as an appropriate control strategy. The reachability analysis for Net-State-Models is extended to a method for the determination of possible hybrid trajectories from an initial to a target system state. An example is used to illustrate the presented concept.