关键词: 机械产品, 设计缺陷, 装配约束, 免疫辨识, 产品设计

Abstract: To identify the design defects which violated constraint conditions quickly and accurately, geometric constraints relationships among mechanical parts were formulated as design defect discriminant functions, and assembly constraint relationship matrix was established based on encoding of geometric constraints between mechanical parts. In this matrix, directed graph was utilized to store the information of matrix, the node of directed graph was used to identify parts number, the data structure of node was used to store the design parameters of mechanical parts, and the weight of directed graph arcs was utilized to denote geometric constraint type. Weights of directed graph arcs were treated as antigen and design defects of mechanical parts as antibody, mutation rules of antibodies were determined according to the affinity between antigen gene and corresponding antibody gene. Through mutation operations for antibodies such as trimming, splicing and replacement, the dynamic recognition of mechanical products design defects was realized based on decoding analysis for weights of directed graph arcs.

Key words: mechanical product, design defect, assembly constraint, immune identification, product design