Fuselage docking posture adjusting method based on airplane central axis superposition

Abstract

The invention provides a fuselage docking posture adjusting method based on airplane central axis superposition. The method comprises the following steps of 1) extracting key points symmetrical about a neutral surface of a fuselage in combination with an assembly process and a fuselage structure; 2) fitting actual position parameters of the neutral surface of the fuselage, and superposing the neutral surface of the fuselage with a target neutral surface by coordinate transformation; 3) establishing a two-dimensional coordinate system on the target neutral surface, and solving a transformation relation with a three-dimensional coordinate system; and 4) establishing a fuselage intersection hole docking matching target function according to a least square method based on the unchangeable neutral surface, and obtaining a large component posture adjusting vector by adopting a genetic algorithm. By adopting the above steps, the problem that the neutral surfaces are not superposed when the middle and rear parts of a fuselage are docked is solved, and the overall docking precision of sections is improved; and a key feature which cannot be measured can be transformed via neutral surface superposition, so that the docking assembly precision of the key feature is improved.

Description

Technical field [0001] The invention provides a fuselage docking attitude adjustment method based on the overlap of the aircraft central axis, which relates to a fuselage docking attitude adjustment method considering the overlap of the longitudinal neutral plane of the aircraft, and belongs to the technical field of aircraft assembly. Background technique [0002] Before assembly and docking of large parts such as aircraft fuselage, the correct position and attitude are required. In traditional aircraft assembly, the docking work platform of brackets or trailer parts relies on analog quantity transmission, which makes it difficult to achieve the same position and attitude of the docking parts, and the docking quality is poor. In recent years, with the development of digital technology, the digital docking system has been applied to component assembly to complete the adjustment of component position and posture. The process is as follows: ①Using digital measuring equipment to mea...

AI Technical Summary

Problems solved by technology

[0004] The present invention is to overcome the problem of single key feature and insufficient consideration of the overall position of the fuselage components in the prior art of docking assembly of large parts such as aircraft fuselages, and provides a method for adjusting the attitude of large parts docking in consideration of the coincidence degree of the neutral plane of the fuselage

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