关键词: 智能设计, 成本估算, 全局特征属性, 复杂产品

Abstract: Aiming at the problem that the searching,changing and cost estimating of similar cases could not be realized when the case-based design method was applied to complex product,a method to construct the mapping relationship between function attribution and global feature attribution was proposed by building the global feature attribution.The global feature attribution was defined by geometry attribution,material attribution and manufacturing information.Based on multi-level artificial neural network,the mapping model between function attribution and global feature attribution was built.On this basis,the models of intelligent design and cost estimation were proposed,which could realize the physical structure similarity evaluation,autogeneration of case adaptation and new cost estimation.The methods of global feature attribution description,mapping model construction and distance-based similar case searching were introduced.The feasibility of the proposed model was verified with cases,and the technology support was provided for intelligent design of complex products.

Key words: intelligent design, cost assessment, global feature attribution, complex product