关键词: 设计结构矩阵树, 多粒度, 元素重要度, 层次进化, 复杂机电系统

Abstract: To reflect the relationships between elements of complex electromechanical system accurately,a Design Structure Matrix(DSM)tree was proposed to illustrate contact details between elements with different granularity.Element's importance degree was defined to quantify the influence degree of elements on the system,and a solving algorithm for calculating element's importance degree was formed based on network topology theory.The mapping rule between levels of DSM tree was determined,and the multi-granularity hierarchical evolutionary approach for n-DSM modeling was introduced.By translating original elements into different granularity,DSM tree was established.Through hierarchical evolutionary mechanism,DSM tree was able to update itself automatically,and simultaneously the target n-DSM was obtained.The example showed that the new modeling approach could improve analytical precision significantly and enable accurate representation of the researched system.

Key words: design structure matrix tree, multi-granularity, element's importance degree, hierarchical evolution, complex electromechanical system