【摘要】 根据成组技术中关于机加工零件相似性的统计结果和零件的表达模型,定义了零件的相似性,提出了一种综合的快速CASE检索算法.该方法根据零件的宏观特征,利用检索法检索出CASE库中与零件宏观特征相匹配的类型,再根据零件的几何造型、属性和材料相似性迅速检索出与设计零件最相似的零件.此外,还对零件的匹配算法和推理规则进行了研究,根据零件的相似性因子的大小,计算了零件的知识量和估计成本,给出了运用基于零件相似性的事件推理方法进行零件几何知识量的计算和成本估计方法.更多还原

【Abstract】 According to the statistical result of the similarity of machined components in the group technology, the similarity of components was defined and a synthetic and quick CASE search algorithm was proposed. On the basis of macroscopic characteristics of components, the algorithm found out the types of components in CASE library which matches to the macroscopic characteristics of components, and searched the most similar components according to their geometry constructions, attribute and material similarity. Matching algorithm between components and reasoning rules were researched. Based on the magnitude of the factor of similarity, the amount of knowledge and estimative cost are calculated, and case-based reasoning method was proposed to quantify the knowledge of components and estimate the cost of components.更多还原