Title :
Modeling and analysis of hybrid systems: a new approach integrating Petri nets and differential equations
Author :
Nenninger, Gero ; Krebs, Volker
Author_Institution :
Inst. fur Regelungs- und Steuerungssyst., Karlsruhe Univ., Germany
Abstract :
Hybrid technical systems combine discrete-state event-driven and continuous-state time-driven behaviour. In this contribution, a general modeling formalism for such systems is proposed. The discrete subsystem is represented by an interpreted Petri net. In addition to external continuous inputs, discrete variables dependent on the net marking affect the continuous subsystem which is a time-driven state space model. Limit violations of particular continuous state variables as well as external binary inputs are interpreted as events and change the discrete state of the system. In view of the analysis of hybrid technical systems reachability and stability are defined. The modeling method is applied to a mixing tank
Keywords :
Petri nets; control system analysis; differential equations; discrete event systems; mixing; modelling; process control; stability; Petri nets; continuous state variables; continuous-state time-driven systems; differential equations; discrete variables; discrete-state event-driven systems; external binary inputs; external continuous inputs; hybrid system modeling; hybrid systems analysis; limit violations; mixing tank; modeling; process control; reachability; stability; time-driven state space model; Concurrent computing; Control engineering; Differential equations; Fluid flow; Industrial relations; Mathematical model; Petri nets; Stability analysis; State-space methods; Valves;
Conference_Titel :
Parallel and Distributed Real-Time Systems, 1997. Proceedings of the Joint Workshop on
Conference_Location :
Geneva
Print_ISBN :
0-8186-8096-2
DOI :
10.1109/WPDRTS.1997.637985