支持异地协同设计的异构CAD虚拟装配系统

针对跨区域企业协同设计需求和现有基于CAD系统的虚拟装配只能单机操作的矛盾,基于虚拟现实建模语言(VRML)通用格式设计了支持异地协同设计的异构CAD模型虚拟装配系统。提出一种VRM L零件装配特征参数提取方法,在此基础上实现了零件装配约束;针对当前互联网环境低传输速率特点,使用基于参数-命令的操作命令传输机制,并运用操作令牌思想解决了协同过程中产生操作冲突的问题;在V-collide函数库的基础上实现了零件动态碰撞检测。通过与产品数据管理系统集成,应用到了产品设计、展示、售后维修整个生命周期过程,提高了设计沟通效率。

Heterogeneous CAD supported virtual assembly system for distributed collaborative design

Collaborative designs now often involve engineers working around the world while current CAD-based virtual assembly systems often only support single-computer operation.This paper presents a VRML(virtual reality modeling language)-based virtual assembly system developed to provide a heterogeneous CAD model collaborative assembly environment.The system uses an assembly feature parameter extraction algorithm to realize the assembly constraints among the VRML part models. Furthermore a C-P(command-parameter) a...