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CLC number: V26

On-line Access: 2011-05-09

Received: 2010-03-23

Revision Accepted: 2010-08-18

Crosschecked: 2011-04-20

Cited: 10

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.5 P.405-414

http://doi.org/10.1631/jzus.A1000110


A new principle and device for large aircraft components gaining accurate support by ball joint


Author(s):  Bao-gui Qiu, Jun-xia Jiang, Ying-lin Ke

Affiliation(s):  The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   qiubaogui@zju.edu.cn, junxia.jiang@126.com

Key Words:  Aircraft digital assembly, Large aircraft component, Accurate support, Ball joint, Displacement sensor, Three coordinate numerical control localizer


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Bao-gui Qiu, Jun-xia Jiang, Ying-lin Ke. A new principle and device for large aircraft components gaining accurate support by ball joint[J]. Journal of Zhejiang University Science A, 2011, 12(5): 405-414.

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Abstract: 
How to obtain an accurate support for large components by ball joint is a key process in aircraft digital assembly. A novel principle and device is developed to solve the problem. Firstly, the working principle of the device is introduced. When three or four displacement sensors installed in the localizer are touched by the ball-head, the spatial relation is calculated between the large aircraft component’s ball-head and the localizer’s ball-socket. The localizer is driven to achieve a new position by compensation. Relatively, a support revising algorithm is proposed. The localizer’s ball-socket approaches the ball-head based on the displacement sensors. According to the points selected from its spherical surface, the coordinates of ball-head spherical center are computed by geometry. Finally, as a typical application, the device is used to conduct a test-fuselage’s ball-head into a localizer’s ball-socket. Positional deviations of the spherical centers between the ball-head and the ball-socket in the x, y, and z directions are all controlled within ±0.05 mm under various working conditions. The results of the experiments show that the device has the characteristics of high precision, excellent stability, strong operability, and great potential to be applied widely in the modern aircraft industry.

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