Abstract

A Petri net is basically a discrete model (discrete state space and allowing modeling of discrete systems). However, Continuous Petri net have been defined, which allow either an approximate behaviour of a discrete Petri net to be provided (particularly when there are many reachable markings), or a continuous process to be modelled. Previously, Bond-graph have been used to describe physical systems (state-space equation and allowing modeling of continuous systems). However, Pseudo Bond-graphs can also be used in non technological domains like economic systems and why not in the higher levels of manufacturing systems. To compare the two approaches and the tools, we consider in this paper an illustrative production system.

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