【摘要】 针对航空航天圆柱体套接结构舱段高精度对接的需求，提出一种基于舱段关键特征的位姿精确测量方法。首先，利用主成分分析算法初步获得舱段轴线和对接平面等关键特征的参数，再利用最小二乘法对参数进行优化矫正，以保证关键特征提取的准确性；其次，在提取到关键特征后，综合考虑关键特征对装配精度的影响，从而建立舱段数字化装配评价模型；再次，利用粒子群算法对模型进行求解，得到两舱段之间的相对位姿；最后，通过搭建舱段模拟试验场景进行验证，对接后对接平面上的特征点集在x、y、z 3个方向的绝对偏差均值分别为0.140 mm、0.157 mm、0.137 mm。经验证可知该精度满足工程应用需求。更多还原

【Abstract】 In order to meet the requirement of high precision docking of aerospace cylinder socket structure cabin, an accurate pose measurement method based on the key features of cabin is proposed. Firstly, the parameters of the key features such as the cabin axis and the mating surface are obtained by using the principal component analysis algorithm, and then the parameters are optimized and corrected by using the least square method to ensure the accuracy of the key feature extraction; After the key features are extracted, the influence of key features on the assembly accuracy is comprehensively considered, and the evaluation model of digital assembly of cabin is established; Finally, particle swarm optimization algorithm is used to solve the model, and the relative position and attitude between the two cabin segments are obtained. Finally, the simulation test scenario of the cabin is built to verify that the mean absolute deviation of the feature point set on the docking surface in the x, y and z directions after docking is 0.140 mm, 0.157 mm and 0.137 mm respectively. The accuracy is verified to meet the engineering application requirements.更多还原