Fuzzified Petri-Nets and Their Application to Organising Supervisory Controller

A model and the decision reasoning processes of a two-layer organising supervisory controller for complex systems have been developed. It is based on fuzzy Petri-net algorithms and fuzzy rule production system for decision and command control. This model follows the fundamental idea of the original intelligent controller of G.N. Saridis, but adds on a new generic property. This fuzzy-Petri-net organising controller employs the advantages of both the qualitative modelling potential of L.A. Zadeh’s fuzzy logic and of the discrete-event genesis of K.A. Petri’s networks. Thus it accomplishes full compatibility of mathematical formalisms of the organising and co-ordinating levels of G.N. Saridis’ architecture and greatly reduces the rules needed due to possibility distribution evaluation and Petri-net-supported reasoning in comparison with Stellakis-Valavanis fuzzy solution for the organiser.