关键词: 虚拟装配, 序列规划, 知识导航, 递进分层推理

Abstract: In allusion to inefficient problem of attaining product assembly sequence by automatic reasoning, an approach combining computer aided knowledge navigation and mans decision-making was put forward. By collaboration between human and computer in virtual environment, assembly sequence planning problem was solved. Firstly knowledge navigation architecture was presented. According to current assembly state, knowledge rules were alternatively utilized in geometry layer and meaning layer and the dynamic navigation arithmetic was proposed by progressive hierarchical reasoning. And then the PRI judgment criteria and hypotheses used in geometry layer were also provided and the representation method of four-layer structure was demonstrated. Finally this approach was proved to be valid by an example.

Key words: virtual assembly, sequence planning, knowledge navigation, progressive hierarchical reasoning