Rectification skin repairing method based on wing body actual measurement data virtual butt joint

Abstract

The invention discloses a rectification skin repair method based on wing body actual measurement data virtual butt joint, which comprises skin registration and repair, and the registration comprises the steps of denoising wing body point cloud data, and carrying out data recombination on a data set obtained after filtering to obtain a key point set; calculating a normal direction feature descriptor of any key point in the key point set and a normal direction feature descriptor of any point in the skin point cloud data; calculating the Euclidean distance between the feature descriptors of the two points by using a K-nearest neighbor tree structure search algorithm, and adding the points with high similarity into the set M; and calling a clustering and Hough voting algorithm for the set M toobtain a local point cloud set matched with the skin point cloud data in the key point set; matching the skin point cloud data with the local point cloud set through a point cloud iterative nearest point algorithm. Skin registration and repair can be completed through computer programs, manpower can be greatly saved, and production efficiency is improved. Meanwhile, the influence of human subjective factors is avoided, and the registration result is more accurate.

Description

technical field [0001] The invention belongs to the field of three-dimensional model processing, and relates to a rectification skin repair method based on virtual docking of wing-body measured data. Background technique [0002] In the field of aircraft manufacturing, the manufacturing process of an aircraft is as follows: first assemble the parts into components, then assemble the components into small parts, then assemble the small parts into the aircraft fuselage and wings, and finally assemble the aircraft fuselage and wings Perform docking assembly. Among them, the docking of the aircraft wing body is an important part of the general assembly of the aircraft, and after the docking of the aircraft wing body is completed, the rectification skin repair becomes the top priority. [0003] Aircraft skin parts are widely used in wing and fuselage parts. They have complex and diverse shapes and large structural dimensions. The number of single machine parts accounts for about...

AI Technical Summary

Problems solved by technology

In the skin repair process at the present stage, the method of manually comparing first, then marking, then repairing, and finally comparing is usually used to gradually and accurately repair the margin, which is labor-intensive and inefficient, and the skin repair accuracy is difficult ensure

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