面向过程的虚拟环境中产品装配建模研究

提出了面向过程的虚拟装配建模方法,在虚拟环境中将装配建模与装配仿真相结合,建立装配关系模型的同时,实现了对装配过程的创建与仿真,从而,在虚拟环境中将面向结果的装配建模发展为面向过程的装配建模.设计者采用直接三维交互进行装配建模操作的同时,系统通过装配关系识别自动捕捉设计者的装配设计意图,通过装配约束运动确定零件的装配路径,通过虚拟装配建模过程信息重用为装配规划提供有效的支持.开发了面向过程的虚拟装配建模原型系统.实践表明,面向过程的虚拟环境中产品装配建模方法有效地提高了产品装配设计的质量与效率.

RESEARCH ON PROCESS ORIENTED ASSEMBLY MODELING IN VIRTUAL ENVIRONMENT

The methods and application of process oriented virtual assembly modeling, which integrate the assembly modeling and assembly simulation in virtual environment are presented. Process oriented virtual assembly modeling not only fulfils the assembly relationship modeling, but also realizes the creation and simulation of the assembly process, thus, assembly modeling can be promoted from result oriented modeling to process oriented modeling in virtual environment. While the designer performs assembly modeling operation in direct 3D interaction, the assembly relationship recognition is devised to capture the assembly design intention automatically, the constrained movement of the assembling part is used to obtain the assembling part's assembly path and final position in assembly, and the reuse of virtual assembly modeling process information is also adopted to support the virtual assembly planning. The methods are implemented in the development of VIRDAS (Virtual reality design and assembly system). The experiment shows the methods can promote the quality and efficiency of virtual assembly modeling rapidly.