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A Position Error Equal Division Method for Positioning and Making Holes Facing Local Reference Holes

A reference hole and error technology, which is applied in the field of automatic hole making for aircraft assembly, can solve problems such as reference hole errors, achieve the effect of reducing position accuracy requirements and simplifying the algorithm

Active Publication Date: 2022-07-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the detection based on the reference hole, there is another important problem that cannot be ignored. The actual reference hole has an error, even reaching more than 1mm, but the accuracy of the hole distance is often below 0.5mm

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  • A Position Error Equal Division Method for Positioning and Making Holes Facing Local Reference Holes
  • A Position Error Equal Division Method for Positioning and Making Holes Facing Local Reference Holes
  • A Position Error Equal Division Method for Positioning and Making Holes Facing Local Reference Holes

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Embodiment Construction

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] like figure 1 shown.

[0014] A position error equalization method for positioning and making holes facing the local reference hole, which includes the following steps:

[0015] First, according to the detected positions of the two reference holes, the scale factor λ of the distance of the reference holes is calculated;

[0016] Let the coordinates of a point P in the original coordinate system and the target coordinate system be respectively P E =[x 1 ,y 1 ,z 1 ] T and P P =[x 2 ,y 2 ,z 2 ] T .

[0017] Set the two corresponding points P of the original coordinate system and the target coordinate system 1 , P 2 , the scale factor λ can be obtained according to the modulo length of the corresponding point vector:

[0018]

[0019] where: is the vector value of the two corresponding points under the original system and the target...

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Abstract

A method for dividing the position error of local reference holes for positioning and making holes is characterized in that: it includes the following steps: first, according to the detected positions of the two reference holes, calculate the scale factor λ of the distance of the reference holes; second, Calculate the coordinate transformation matrix in the original coordinate system and target coordinate system with scale factor; thirdly, use the solved scale factor and coordinate transformation matrix to solve the hole-making point position after the error is evenly divided. The algorithm of the invention is simple and convenient, and does not need to manually change the hole-making point of offline programming according to the online detection data, and can be integrated into the equipment to be completed automatically; the invention greatly reduces the positional accuracy requirements of the reference hole.

Description

technical field [0001] The invention relates to a position error equalization method for positioning and making holes for local reference holes, belonging to the technical field of automatic hole making in aircraft assembly, and in particular to a solution to the problem of out-of-tolerance problem of partial hole spacing in hole making due to the error of the reference hole itself method. The method can be used for installation in various flexible track hole-making systems, autonomous mobile automatic hole-making systems, industrial robotic arm hole-making systems, etc., and solves the position error problem of local reference hole positioning. Background technique [0002] As an important part of the aircraft manufacturing process, aircraft assembly accounts for 50% to 70% of the entire aircraft manufacturing cycle, and plays a crucial role in the manufacturing quality, service life and production cost of the entire aircraft. At present, in the process of aircraft assembl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G01B21/16B64F5/60
CPCG01B21/00G01B21/16B64F5/60
Inventor 王珉田威张得礼陈文亮惠昊翀陶克梅金霞潘劲伟索玉福李奕星吕广渌吕帅强施天岚樊启豪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS