协同CAD设计中基于设计历史的冲突检测算法

A Conflict Detection Algorithm Based on the Design History in Collaborative CAD Design

多位设计者并发地对特征进行操作,具有同步性、分布性和无约束性的特点。并发控制的基本目标就是通过对各用户的操作进行限制,规范化设计时序,保持设计工作的顺利进行。与文字、图像等数据的并发控制相比,CAD特征之间各种复杂的关系(如特征的空间关系、依赖关系等),使得基于特征的并发控制十分困难。对CAD特征之间各种复杂关系对协同并发操作的影响进行详细分析,并给出复制式协同环境下并发冲突的检测方法和解决方案。

A number of designers usually concurrently operate CAD features with synchronization,distribution and characteristics of non-binding.The basic goal of concurrency controlis torestrictthe operationsofeach distributed designer,standardize the design sequence and to keep the design work carried out successfully.Compared with the text,images and other data concurrency control,CAD features have a variety of complexrelations(such as the characteristics of spatial relationships,dependencies,etc.),which make the concurrency control more difficult to achieve.This paper comprehensively analysis the impact of collaborativeconcurrent operation caused by the complex relationshipsbetween CAD features,and gives the concurrency conflict detection methods and solutions in replicated collaborative environment.