大部件对接中iGPS高精度位姿测量优化设计

doi:10.7527/S1000-6893.2014.0286

Abstract

Abstract:

In order to ensure the accuracy and improve the efficiency of posture measurement for large size component joining, at the same time, to achieve large size optimal component posture assembly, optimal design technology based on iGPS measurement system of posture measurement for large size component joining has been put forward. Firstly, the joining measurement network based on iGPS system measurement model and uncertainty model is established; then, the accuracy of network measurement is analyzed by simulation and iGPS multi-transmitter station distribution of joining measurement network is designed optimally. Secondly, the station distribution of posture alignment benchmark points is designed optimally based on simulation analysis of large size component posture parameters' solving model and uncertainty model. Finally, posture measurement mode contrast test is conducted on a large size component joining. The results indicate that the position adjustment uncertainty of x, y, z is less than 0.16 mm and the attitude adjustment uncertainty of attitude roll angle, pitch angle and deflection angle is less than 3.1". The accuracy is improved by at least 20% compared to the measurement methods without optimal arrangement design. Consequently, it is proved that the method of measurement optimal design can measure a large mobile part in real time efficiently and with high accuracy, and it is feasible to effectively improve the efficiency and accuracy of large size component measurement .

Key words: large size component joining, posture, digital measurement, iGPS, station layout optimization

CLC Number:

V556.2

LIN Xuezhu, LI Lijuan, CAO Guohua, REN Jiaojiao, ZHENG Linbin, LIU Qi. Optimal design based on iGPS high-precision posture measurement for large size component joining[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(4): 1299-1311.

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Optimal design based on iGPS high-precision posture measurement for large size component joining

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