产品装配数字孪生可视化模型自适应精简方法  

Adaptive Simplification Method for Product Assembly Digital Twin Visualization Model

作　　者：何其昌[1] 许志杰 HE Qichang;XU Zhijie(Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学,上海200240

出　　处：《航空制造技术》2022年第19期50-55,共6页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(51975362)。

摘　　要：针对产品装配数字孪生模型实时可视化的需求,提出了一种面向装配过程的可视化模型精简方法。首先利用B–Rep信息建立模型的AAG(属性邻接图),通过基本特征AAG的图匹配实现装配特征的自动识别;对装配语义进行解析,提取当前装配过程的装配特征;然后采用改进QEM(二次误差度量)算法,优化边折叠误差,实现模型局部精简率的自适应调整,满足实时可视化的需求;最后以某型号发动机机匣装配为例验证了方法的有效性。Aiming at the requirement of real-time visualization of the assembly digital twin model of product,a visualization model simplification method oriented to the assembly process was proposed.Firstly,the AAG(Attributed adjacency graph)of the model was established by using the B–Rep information,the automatic recognition of features was realized through the graph matching of the basic feature AAG,and the assembly semantics were analyzed to extract the assembly feature information of current assembly process;Then,the improved QEM algorithm was used to optimize the error of edge collapse,which realized the adaptive adjustment of local simplification rate of the model and met the need of real-time visualization.Finally,the effectiveness of the method was verified by taking the assembly of a certain type of engine casing as an example.

关 键 词：装配数字孪生 装配过程 装配特征识别 装配语义 改进QEM 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TB472[自动化与计算机技术—计算机科学与技术]