Modification Extraction Method for Complex Components of Large Aircraft Fused Point Cloud Processing
Aiming at the problem of adaptive machining and modification of large and complex aircraft compo-nents,a modification extraction method of large aircraft components fused point cloud processing is proposed.Firstly,according to the characteristics of the workpiece,the α-shapes curved surface reconstruction algorithm and greedy projection triangulation algorithm are integrated to realize the 3D mesh reconstruction of the compo-nent measurement model.Then,the reconstructed component curved surface is divided into blocks,the distance between the points and the fitted curved surface is calculated,and the feature points of the scanning laser line are identified according to the distance.The identified feature points are arranged according to certain rules,and the assembly modes and point cloud boundaries of aircraft cabin door and door frames are processed,and the position of the feature points is compensated according to the error direction,so as to realize the rapid ex-traction of the modification of large aircraft components.The experiment shows that the accuracy of the modifi-cation calculated by this method can reach 0.08 mm,which can meet the needs of the adaptive accurate modi-fication of large aircraft components.
point cloud processingcurved surface fittingnumerical control machiningerror compensation
万方数据
维普
