关键词: 飞机装配, 关键特征, 误差分配, 自动对接

Abstract: To realize automatic adjustment of large aircraft components,the postures of large components were expressed and the adjustment vectors with six degrees of freedom were determined.For the assembly variation accumulation on the surface of large components,it was difficult to obtain the correct assembly vector with the traditional method,which took the measured points on the surface of large components as assembly reference points to calculate large components'postures.A new method based on key features of large components was proposed.The key characteristics of large component were identified and the assembly vector was obtained.By optimizing the tolerance distribution,the optimal assembly matrix satisfying assembly quality requirements was established.This method defined component postures accurately and improved the assembly quality and efficiency.Through the application of assembling horizontal stabilizer and vertical stabilizer,and comparison with the conventional posture adjusting method,the validity of the method was verified.

Key words: aircraft assembly, key characteristic, tolerance distribution, automatic assembly