产品特征间关系的表达和算法研究

Research on Representation and Algorithms for Product Feature Relationship

面向产品全生命周期的特征建模是现代产品建模技术的关键之一。在几何特征建模技术中广泛采用的CSG树在描述多个领域的特征关系时存在不足之处。图状结构可以描述比树状结构更为复杂的关系 ,本文采用图状结构——特征图来描述特征间的关系 ,讨论了存储特征图的具体数据结构和定义在其上的一些基本运算。本文中所讨论的技术已被应用于轴的集成数据模型中的特征关系描述 ,并取得了良好的应用效果。

The feature model of whole life cycle of the product is the foundation to the modern product data model. The CSG, used in representation of geometrical feature model, is unable to meet the representation requirement of multi domain feature model. The graph structure can be used to describe more complex relationship than the tree one. In this paper the so called feature graph has been used to represent the relationship among domain features. The detailed data structure used to store the feature graph is discussed and the corresponding algorithms based on this data structure are studied also. The result of this research has been used to create the integrated feature model of shaft and the result is good.