飞机部件数字化调姿定位测量点的优选与构造算法

doi:10.7527/S1000-6893.2021.25514

Abstract

Abstract: In the aircraft digital assembly process, the position and attitude of the aircraft components is usually controlled by the coordinates of the measuring points fixed on the components. The aircraft component would be adjusted from its initial attitude to the target one according to the attitude and position relationship between the actual coordinates of the measuring points located on aircraft component and the theoretical coordinates. In actual working conditions, the actual length between the measuring points would be deviated from the theoretical length, or even out of tolerance, which could cause a large internal force to the system during the attitude adjusting and positioning, and affect the accuracy of the attitude adjustment for an aircraft component. To improve the overall accuracy of the aircraft component's attitude adjustment, and reduce the system's internal force in the attitude adjustment process, a method for optimizing measuring points is presented in this work. The deviation calculation between measuring points fixed on aircraft components and the theoretical coordinates is presented in details, and the optimized measuring points are finally determined by constructing the optimization criterion of the measuring points. Furthermore, the optimized measuring points are matched to the theoretical coordinates, so that the error of the construction points are within the design tolerance, and the sum of the squares of the distances between the construction points and the target points are minimized. The results show that there are more measuring points whose position accuracy met the design requirement. After optimization and algorithm construction of measured points, the numbers of effective measuring points could be increased by 30% and the internal force of the system during the attitude adjustment and positioning of the aircraft components is reduced by 4.4% of that without optimization and configuration.

Key words: attitude adjusting and positioning, measuring points, overall accuracy, system internal force, optimization algorithm, construction algorithm

CLC Number:

V262

BA Xiaofu, XUE Hongqian, LI Xining. Optimization and construction algorithm of measuring points for digital attitude adjusting and positioning of aircraft components[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(5): 625514-625514.

References

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Optimization and construction algorithm of measuring points for digital attitude adjusting and positioning of aircraft components

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