In: Journal of International Robotic Systems Theory and Applications, Vol. 26, No. 3-4, pages 423-437. 1999.
Abstract: PSF-R production flow schema with resources is a novel practical representation for complex resource sharing discrete production systems proposed in this paper. The PFS-R is an augmented version of the PFS which includes correspondences of system resources at each production step. The PFS-R is able to model system structures as well as system behaviors in a more simplified and transparent manner than ordinary Petri net representation. That is, the PFSpR solves an important drawback when actually adopting Petri nets as a design technique for intelligent manufacturing systems. First, the paper introduces the basic elements of PFS-R into hybrid nets and Petri nets, taking into account the net conservativeness. Next, examples of discrete production systems to illustrate the effectiveness of PFS-R are presented. In addition, it is shown, using an example, that the correspondence between resources and production steps in the process flow has a tree structure, which is an effective way to evaluate whether or not the objects designed have a well-defined structure.
Keywords: Petri nets, resource arcs, resource sharing systems.
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