虚拟装配系统的建模、干涉检验及仿真

以产品特征模型为核心,提出了一种开发虚拟装配系统的特征建模方法和一种干涉检验算法,该特征建模方法采用矩阵存储装配关系的层级装配模型,实现了简化装配序列求解的目的;运用此干涉检验算法可以有效地计算产品各个零部件之间任意方向上的相对距离或干涉程度,然后综合特征建模方法提供的非几何信息进行可装配性分析·仿真部分包括装配仿真和运动仿真,利用层次装配模型生成的装配序列进行交互式有监督功能的装配仿真;参数化的运动仿真使用户可以充分了解机器的运动特性,发现与运动相关的问题,进行设计修正·

Modeling, Interference Checking and Simulation of Virtual Assembly Systems

Taking product's feature as core, a modeling procedure is proposed to develop virtual assembly systems with an algorithm given to check interference. By this procedure the solution to sequential assembly scheme can be simplified using a hierarchical assembly model to store all the interactions among parts in a matrix. The algorithm is used to compute effectively relative distance between any parts to be assembled in any direction, i.e., the equivalent interference, and then analyze the assembly possibility of all non-geometric information provided by the modeling procedure. The simulation consists of assembly simulation and kinematics simulation, where the former is performed and monitored interactively using the sequential assembly scheme created by the hierarchical assembly model. The parameterized kinematics simulation enables the users to understand fully the kinematical properties of the machine in assembly and find out the problems in relation to kinematics for convenient design correction.