境界因子設計モデルのペトリネットによる制御 : 設計モデルの階層化に関する研究

概要

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In order to build a CAD system, The "Boundary Factor Model (BFM)" as the design model, a method to control a design process based on the use of a Petri net, and the "Object Operation" representation as the representation method of design knowledge have been reported. This paper focuses on the self-organization of the boundary factor model toward the hierarchical structure. The boundary factor model can be used as both a top-down and a bottom-up model. As the design proceeds, it is often necessary for the design model to have both of phases. Firstly, it is described how the boundary factor model is capable of representing a hierarchical structure and that it serves as the top-down and bottom-up model. Then, the algorithm is proposed to build up the hierarchical structure of the design model by the use of the properties of the Petri net. Since one structure of the Petri net is the mapping of that of the BFM, the hierarchical structure of the Petri net can map that of the BFM. It is formulated the Petri net control equation represents a hierarchical structure of the Petri net and is shown algorithms build up this formulation. According to this formulation, the structure of the BFM is rearranged hierarchically. Examples show that the BFM is self-organized in the hierarchical structure.
社団法人精密工学会の論文
1991-04-05