协同设计的三维几何模型多粒度描述方法  

Multi-granularity Description of 3D Geometrical Model for Collaborative Design

作　　者：罗天洪[1] 罗文军[2] 陈小安[2] 杜子学[1] 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074 [2]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《重庆大学学报（自然科学版）》2007年第4期16-20,共5页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50175113);重庆市自然科学基金资助项目(CSTC2006BB3418)

摘　　要：为了保持协同设计中几何模型信息获取和信息传递的通畅,研究了三维几何模型不同粒度描述的组成部分,包括三维模型的几何知识,与制造工艺及产品生命周期相关的形状特征信息.由于粗粒度的描述方法过于注重信息描述的形式,细粒度的描述方法过于注重信息描述的内容,粗粒度和细粒度的描述方法均不能满足产品生命周期中的某些特定应用阶段的需求,所以提出了能克服粗粒度和细粒度描述方法固有弊端的多粒度描述方法,既能满足多方协同用户的需求,又能满足网络信息传输的需求.To ensure the kilter to abstract and transfer information for Internet-driven collaborative design, a multi-granularity description and data structure of 3D geometrical model are presented. The multi-granularity description approach is composed of geometric knowledge of 3 D model, the form feature information relative manufacturing process and life-cycle of product. Traditionally, the roughness - granularity description was fastened excessively on the format of information presentation. On the other hand, the minuteness-granularity description emphasizes excessively the content of information presentation. This meant, that neither the pure roughness-granularity nor the pure minuteness-granularity presentation for 3D geometrical model, can meet all the requirements at certain phases during the life-cycle of the product. The multi-granularity description of 3D geometrical model, which integrated both of roughness-granularity and minuteness-granularity presentation, can reasonably, completely and fleetly, describe 3D geometrical model according to the design requirements of the collaborative designers.

关 键 词：协同设计 几何模型 多粒度描述 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]