Research on knowledge representation of product model in intelligent CAD

To improve the efficiency of accumulation and management for model knowledge in intelligent CAD system, a new semantic representation based method is presented. It represents product models by semantic representation, simplifies knowledge structure via deleting all isolated semantic nodes and control data and creates product model knowledge with independent set and strong relation set of semantic nodes. This method can not only improve knowledge ability of saving semantic and function information, but also reduce users´ operations greatly. Experiments on computer show that this new method is more adaptable and practicable.