On Resource Arc for Petri Net Modelling of Complex Resource Sharing System

• Published in: Journal of intelligent & robotic systems Vol. 26; no. 3-4; pp. 423 - 437
• Main Authors: Hasegawa, K, Miyagi, P E, Santos Filho, D J, Takahashi, K, Ma, L, Sugisawa, M
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01-11-1999
• Subjects: Design engineering; Equivalence; Graphical representations; Petri nets; Representations; Studies; Transformations; Trees
• ISSN: 0921-0296; 1573-0409
• DOI: 10.1023/A:1008122101686

PFS-R - Production Flow Schema with Resources - is a novel graphical representation for complex resource sharing discrete production systems proposed in this paper. The PFS-R is an augmented version of the PFS (Production Flow Schema, previously proposed by the authors) which includes correspondences of system resources at each production step. The PFS-R is able to model system structures as well as system behaviours in a more simplified and transparent manner than ordinary Petri net representations. That is, the PFS-R 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, and the equivalent transformations of PFS-R model 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.[PUBLICATION ABSTRACT]