Geometry Error Identification on Calibration Device of Cryogenic Liquid Level Sensor
WANG Mei-bao1,LI Dong-sheng1,HU Jia-cheng1,YANG Yang2,ZHU Yue2,ZHANG Cheng-lin2
1. China Jiliang University, College of Metrology & Measurement Engineering, Hangzhou, Zhejiang 310018, China
2. Shanghai Aerospace Equipments Manufacture, Shanghai 200245, China
Abstract：In order to solve the problems of fixture spatial attitude on calibration device of cryogenic liquid level sensor, an error identification based on the principle of multilateral method is proposed. Based on the high-precision distance measurement of laser tracker, using the principle of multilateral method to calibrate the track of the calibration device, a virtual coordinate system is created which uses the gravity opposite direction as Z-axis direction, and because two positions always being the same in rigid body, the redundant data of six errors are obtained, so the error identification of calibration device is finished. Simulation results show that the method is feasibility, combinating genetic algorithm and trust region method with Guass-Newton can effectively avoid non-convergence problem which were caused by unknown initial data.
2016, Vol. 37 
