Multi-constraint-condition aircraft skin attitude adjustment method and system

Abstract

The invention discloses a multi-constraint-condition aircraft skin attitude adjustment method and system. The method comprises the steps: acquiring related position data of a skeleton and inner and outer sides of an assembled skin/a to-be-assembled skin; processing the data to obtain a feature hole position on the to-be-assembled skin, a feature hole position on the skeleton, an outer side surfacetype of the skeleton, an inner side surface type point cloud of the to-be-assembled skin and an outer side contour point set of the to-be-assembled skin; calculating a pose solution set of the to-be-assembled skin under the condition of meeting a tolerance threshold by using the point cloud; enabling the point set to be in the pose solution set, and calculating a sub-solution set, under the condition of meeting a tolerance threshold, of the to-be-assembled skin; calculating an optimal pose solution with an infinitely small assembly gap in the sub-solution set by utilizing the positions of thefeature holes, the inner side point cloud and the point sets of the outer side contour of the to-be-assembled skin; and judging whether the optimal pose solution exists or not, if so, carrying out apose adjustment process according to the solution, otherwise, expanding a tolerance threshold, and iterating the process until the solution exists. With the method, the docking task requirement can bemet on the premise of multi-tolerance constraint.

Description

technical field [0001] The invention relates to the technical field of large-scale aircraft digital assembly, in particular to a method for digitally adjusting the attitude of the skin to be assembled when there are multiple tolerance constraints during the docking work of skin and skeleton assembly in aircraft assembly. Background technique [0002] During the aircraft assembly process, a large number of assembly problems between the skin and the skeleton are involved. With the increasing quality of aircraft, especially the increasing requirements for super maneuverability and stealth performance of military fighters, the requirements for the shape accuracy of aircraft are more stringent. Therefore, it is necessary to strictly control the assembly process related to the shape accuracy of the aircraft. The tolerance requirements related to it include: the shape accuracy of the aircraft, the gap between the skin and the seam, and the difference between the skin and the seam....

AI Technical Summary

Problems solved by technology

The design of the positioning holes only depends on the ideal digital model of the aircraft. Due to the existence of manufacturing errors and assembly errors, the accurate alignment of the positioning holes does not mean that the quality of the butt joint between the skin and the frame is good, and the relevant tolerance constraints cannot be guaranteed.

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