面向CAPP的多级知识获取策略

Strategies to Acquire Knowledge Rel-ative to CAPP at Multiple Levels

通过分析工艺规程设计特点和CAPP专家系统中分层知识库结构模型,提出基于元知识控制的多级知识获取策略,并阐明各模块的功能及特点,进而建立智能化交互式工艺知识获取系统,并详细讨论加工链表设计子知识库的建立过程。

After analyzing the characteristics of process planning and the structural model of hierarchical knowledge bases in the CAPP expert system,this paper proposes the strategies to acquire knowledge at multiple levels on the basis of meta-knowledge control and expounds the functions and features of various modules so as to establish an intelligent interactive system for acquiring knowledge of processes. Moreover,procedures to establish sub-bases of knowledge for designing process chain charts are discussed in detail.