关键词: 设计理性, 模型重构, 知识网络评价, 知识粒度, 粒度变换

Abstract: To satisfy the requirements of enhancing Design Rational (DR) quantify in different abstraction level,the granularity evaluation methods of DR knowledge were researched based on DR modeling.The main characteristic of knowledge body was discriminated and structure composition factors that affected the knowledge granularity were analyzed.The granularity measurement method was established to achieve a uniform evaluation system and it could provide an objective and quantitative basis and objectives for the conversion,comparison and optimization of different granularity design rationale model.Partial design process of the bending die was taken as an example to verify the feasibility and validity of the proposed methods on the measurement and guidance for model reconstruction.

Key words: design rational, model reconstruction, knowledge network evaluation, knowledge granularity, granularity transformation