产品特征建模中过渡特征的研究

A Study of the Relationship of Transition Features for Product Modeling

在研究基于特征的产品建模方法时，往往缺乏对特征关系本质的研究．在分析目前过渡特征研究所存在的问题的基础上，讨论了过渡特征的定义方法以及过渡特征之间的关系，提出了过渡特征分组的观点．并给出了基于过渡特征关系矩阵的有向无环图的产品过渡特征模型及研究方法．文章讨论了建立产品过渡特征模型过程所遇到的主要问题．并给出了应用实例．

The output about product information in available CAD software is a static description for a sequence of features. The relationship of features has been overlooked. Actually features must follow a definite rule when they are assembled in to a part. This paper discusses the main limitation of the transition feature approach in product model. A new definition of transition features and the relationship among them are discussed. Based on the relationship matrix of transition features and its non looped digraph, an approach to product modeling is presented. Finally a typical part is used as an example to test the applicability of the approach.