Petri nets for modeling of dynamic systems—a survey
Automatica (Journal of IFAC)
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Petri nets enable a discrete event system of any kind whatsoever to be modeled. They present two interesting characteristics. Firstly they make it possible to model and visualize behaviors comprising concurrency, synchronization and resource sharing. Secondly the theoretical results concerning them are plentiful. The aim of this paper is to present a new approach of modelling of the Hybrid Dynamic Systems HDS in the field of the electrical engineering systems. The modelling tool is the Hybrid Petri net HPN, an extension of the Petri nets PN. The HPN unify within the same formalism the modelling of the continuous and discontinuous phenomena basically non dissociable in an electrical engineering unit. It integrates two types of PN: The continuous Petri net CPN models the part continues HDS; traditional PN models the discrete part of the SDH. We represent in this article in the first time the tool of modelling the hybrid Petri net. Then the methodology of representation by HPN of the static inverters, these constituting of the real examples of the hybrid dynamic systems the discrete aspects of these systems are due to operations and the order of the semiconductors (on/off) and the aspects continuous are due to the electrical and mechanical variables of system. The designed model can be uses at the same time for simulation, the control and the monitoring of the system.