关键词: 制造工艺, 知识表示计算机辅助工艺设计, 知识粒度, 知识发现, 知识表示

Abstract: To deal with the complexity and uncertainty of manufacturing process knowledge and the requirements for easy knowledge description, a structural method for handling polymorphism manufacturing process knowledge was presented after introducing the concept of process knowledge information granule. After formally describing the notions of process knowledge granularity and analyzing the characteristics of multi-granularity process knowledge, a method to describe knowledge in design process and the relationships among process knowledge elements were proposed as well. The core of this method was the definition of a triple (K, F, T) representing process knowledge domain, property function and domain structure respectively. Based on this formal model, the acquisition and discovery method of process knowledge was discussed including semantic matching, classification operation, association rules and clustering analysis. This proposed method for process knowledge granularity threw a new light on solving the problem induced by multi-pattern, multi-level process knowledge and multi-tactic in application.

Key words: manufacturing process, computer aided process planning, knowledge granularity, knowledge discovery, knowledge representation