Abstract
Proposed in the paper is an object-oriented modelling OOM framework, called a JR-net modelling framework, for automated manufacturing system AMS design. The proposed modelling framework, which consists of a graphical modelling tool called JR-net job resource relation-net and a modelling building procedure, is the same as the current practice of AMS design and is based on the OOM paradigm. In other words, a virtual prototype of AMS is constructed step-by-step based on a three-phase modelling approach: Static layout modelling object model ; job flow modelling functional JR-net model ; supervisory control modelling dynamic model . A functional JR-net model is a directed graph in which the standard resources of an AMS become nodes and job transfers among the resources become the arcs of the graph. A complete dynamic JR-net model is obtained by specifying supervisory control requirements using tokens in the functional JR-net model. The usefulness of the proposed OOM framework is demonstrated by applying it to the modelling of an AS RS. Also addressed are implementation issues of JR-net models.
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