关键词: 生长型设计, 功能结构设计, 产品复杂度, 产品基因, 分类指标, 信息熵, 进化策略

Abstract: By comparing the mechanism of complex biological evolution with the product complexity, a complexity design strategy in incremental growth design was put forward. The classification indexes describing the complexity of product genes were defined. Unit complexity as well as population complexity was defined to describe the complexity about the self-constraint of product genes and the total product complexity at certain stage of design procedure respectively. By applying the information entropy, a mathematical model was developed to qualitatively measure the product complexity, in which product function information, geometric structure information, the assembly complexity and the manufacturing complexity were involved. Finally, to realize a natural selection in growth procedure, by decomposing the product genes into multiple classes, the product composing unit evolution strategy taking complexity as control factor was advanced.

Key words: incremental growth design, functional structure design, product complexity, product gene, classification index, information entropy