The assembly process of aerospace products such as satellites and rockets has the characteristics of single- or small- batch production, a long development period, high reliability, and frequent disturbances. How to predict and avoid quality abnormalities, quickly locate their causes, and improve product assembly quality and efficiency are urgent engineering issues. As the core technology to realize the integration of virtual and physical space, digital twin (DT ) technology can make full use of the low cost, high efficiency, and predictable advantages of digital space to pro- vide a feasible solution to such problems. Hence, a quality management method for the assembly process of aero- space products based on DT is proposed. Given that traditional quality control methods for the assembly process of aerospace products are mostly post-inspection, the Grey-Markov model and T-K control chart are used with a small sample of assembly quality data to predict the value of quality data and the status of an assembly system. The Apriori algorithm is applied to mine the strong association rules related to quality data anomalies and uncontrolled assem- bly systems so as to solve the issue that the causes of abnormal quality are complicated and difficult to trace. The implementation of the proposed approach is described, taking the collected centroid data of an aerospace product's cabin, one of the key quality data in the assembly process of aerospace products, as an example. A DT-based quality management system for the assembly process of aerospace products is developed, which can effectively improve the efficiency of quality management for the assembly process of aerospace products and reduce quality abnormalities.

Cunbo Zhuang;Ziwen Liu;Jianhua Liu;Hailong Ma;Sikuan Zhai;Ying Wu

Laboratory of Digital Manufacturing,School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314000,China;Shanghai Institute of Spacecraft Equipment,Shanghai 200240,China

中国机械工程学报

[1]Cunbo Zhuang;Ziwen Liu;Jianhua Liu;Hailong Ma;Sikuan Zhai;Ying Wu-.Digital Twin?based Quality Management Method for the Assembly Process of Aerospace Products with the Grey?Markov Model and Apriori Algorithm)[J].中国机械工程学报,2022(05):83-103

rockets

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