ABSTRACT

With the development of digital twin, the research on the fusion of intelligent manufacturing system and digital twin technology attracts more attention. In this paper, the realization of digital twin is studied for geometric feature online inspection system of body-in-white (BIW). A three-level virtual modeling approach of Element-Behavior-Rule is proposed for the physical environment modeling in a digital environment. An element model, behavior model and rule model are defined, respectively, and the relationship among the three-layer model is given for real-time communication. A three-layer communication architecture of the digital twin system is designed for the real-time mapping between physical and virtual space, and the process of the online inspection digital twin system is analyzed. Finally, on the basis of the online inspection physical experimental platform and JHIM (Jiangheng Intelligent Manufacturing) software platform, the digital twin system for geometric feature online inspection of BIW is developed, which shows that the virtual model can be driven in real time by real-time physical inspection data. Digital twin technology provides a feasible way for real-time monitoring of the online inspection system.

摘要

随着数字孪生的发展，智能制造系统与数字孪生技术融合的研究越来越受到关注。本文研究了白车身几何特征在线检测系统数字孪生的实现。针对数字环境下的物理环境建模，提出了一种元素-行为-规则的三级虚拟建模方法。分别定义了元素模型、行为模型和规则模型，并给出了三​​层模型之间的关系，用于实时通信。针对物理空间与虚拟空间的实时映射，设计了数字孪生系统的三层通信架构，分析了在线检测数字孪生系统的运行过程。最后，在在线检测物理实验平台和JHIM（江恒智造）软件平台的基础上，开发了白车身几何特征在线检测数字孪生系统，实现了虚拟模型的实时驱动物理检查数据。数字孪生技术为在线检测系统的实时监控提供了一种可行的方法。