基于数字孪生的装配过程质量控制方法

Quality Control Method of Assembly Process Based on Digital Twin

针对飞机机翼装配过程中装配累计误差大,返修率高等问题,对数字孪生技术在装配过程中的应用进行了研究。提出基于数字孪生的装配过程质量控制方法,通过构建数字孪生车间并使用各种数字化装配和检测设备对装配数据进行实时采集和分析,在研究和分析历史装配质量数据的基础上,通过Copula理论构建质量控制点之间的相关性模型,再借助装配质量熵和互信息理论构建产品装配稳定性测度模型,对装配质量控制点控制阈进行优化,预测并给出下一步的最优化装配方案,将最佳装配方案传送到物理车间进行实际装配。最后,在某车间以某型号机翼翼盒装配为例,对原型系统进行了应用验证,证实了整套方法的可行性。

In view of the large assembly error and high repair rate in the production process of the aircraft wing assembly workshop,the application of digital twin technology in the assembly process was studied,and the quality control method of the assembly process based on digital twin was proposed.Various digital assembly and inspection equipment collect and analyze assembly data in real time.Based on the research and analysis of historical assembly quality data,the correlation model between quality control points is constructed through Copula theory,and then the assembly quality entropy and mutual information are used.Theoretically build a product assembly stability measurement model,optimize the control threshold of assembly quality control points,predict and give the next optimal assembly plan,and transfer the best assembly plan to the physical workshop for actual assembly.Finally,the prototype system is verified by an example of wing box assembly in a workshop,which proves the feasibility of the whole method.