An assembly position simulation method for aircraft virtual assembly analysis

Abstract The new generation of aircraft has put forward higher requirements for assembly quality and assembly efficiency. The traditional on-site "test-fit-repair-fit" method is highly dependent on manual labor, and there are problems of low assembly quality and assembly efficiency; on the other hand, the virtual assembly simulation technology based on the theoretical model has problems such as "imitation but not true". On the other hand, the virtual assembly simulation technology based on theoretical model has the problem of "imitation but not real". Therefore, this paper proposes an assembly position simulation method based on the virtual assembly analysis technology based on the measured model. Firstly, a feature reconstruction method based on NURBS algorithm is introduced to reconstruct the aircraft assembly features with high accuracy; secondly, Monte Carlo method is used to sample the assembly position of the parts for simulation, and the uncertainty model of the monitoring feature position is constructed. Finally, the feasibility of the method is verified by designing and manufacturing test pieces, which proves the real effectiveness of the feature reconstruction algorithm and the assembly simulation method.