Abstract
In modeling autonomous distributed manufacturing systems, a basic module of the net structure in the colored Petri net is introduced to describe the configuration of a machining cell and its autonomous decision making for real time scheduling. The arc expressions and transition guards are used to express the local decision making activities and the progress of the part process in each module. Three types of colored tokens which are the part token, the machine token and the AGV-token are introduced to record their own current states. The local decision making and information processing are made on the local computer attached to each machine. The whole system which consists of several machining cells can be represented by connecting the corresponding modules in which the transporting transitions between machining cells play the role of the interface between modules. The central computer makes the transporting schedule of the AGV by coordinating the transporting orders from various machines.
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