Auto-collimation Measurement Method and Calibration Experiments for Space Vectors of Satellite On-board Sensor

doi:10.3901/JME.2019.04.010

Abstract

Abstract: An auto-collimation measurement method for space vectors is proposed to precisely calibrate coordinate systems of satellite on-board sensors. With this method, high-precision automatic measurement of the angle between normal vectors of cube faces is achieved by employing the photoelectric auto-collimation theodolite, satellite turntable, reference mirror array, and coordinate translation system. The measurement model is provided and the error model is constructed based on the principle of error propagation. Then the upper limit of the uncertainty is derived. The sensitivity of the sensors' accuracy on the measurement error is analysed via simulation, based on which error is distributed. An auto-collimation measurement system for space vectors of satellite on-board sensors is designed and developed. Calibration experiments show that the angle accuracy of the theodolite is up to 0.6", the verticality error between two axes is less than 0.2", and the systemic measurement accuracy of the space angle is up to 3". These results demonstrate the effectiveness of the proposed method, the rationality of the error distribution, and the feasibility of the design. This research provides useful information for the development and application of the high-precision automatic measurement and calibration system for the satellite on-board sensors.

Key words: automatic measurement, calibration of coordinate system, measurement of space vector, photoelectric auto-collimation theodolite, satellite on-board sensor

CLC Number:

V465
V447

LIU Yanfang, MA Mingyang, LIU Yongbei, QI Naiming, YE Dong. Auto-collimation Measurement Method and Calibration Experiments for Space Vectors of Satellite On-board Sensor[J]. Journal of Mechanical Engineering, 2019, 55(4): 10-18.

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