关键词: 参数关联结构, 有向图, 广义模块, 变型设计

Abstract: In the product variant design process, the relationship of parameter association structure was complex. To solve this problem, product structure levels were expressed with generalized modular theory so as to reduce product structure level and shorten parameter transfer chain. The concept of directed graph of parameter association structure for generalized modular was proposed with the use of directed graph theory, generalized modular, sub-modular and part represented by vertex, the driven relationship of parameter association represented by directed edge, and the properties of directed graph of parameter association structure for generalized modular were obtained. The directed graph of parameter association structure for generalized modular was divided into a number of sub-graphs according to the hierarchical relationship of product-level modular structure. And the horizontal edges of sub-graphs among vertexes were decomposed. Therefore, a standardized relationship of parameter association structure was established. And its decomposition algorithm and the mathematical description of parameters association were also presented. It provided the theoretical basis for parameters association analysis of variant design. Finally, the case for belt conveyor was used to demonstrate the effectiveness of the proposed method.

Key words: parameer association structure, directed graph, generalized modular, variant design