A new principle and device for large aircraft components gaining accurate support by ball joint |
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| Authors: | Bao-gui Qiu Jun-xia Jiang and Ying-lin Ke |
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| Institution: | The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China |
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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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