| Citation: | MAO Boyuan, JI Junpeng, ZHANG Pengfeiet al. High-precision decoupling calibration method of multi-dimensional mounting spacecraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(4): 754-760. doi: 10.13700/j.bh.1001-5965.2019.0285(in Chinese)
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Aimed at the calibration problem of spacecraft multi-dimensional installation in the coupling situation, an on-orbit calibration method based on imager observation is proposed, and this method effectively overcomes the coupling nonlinearity of the calibration equations. Firstly, the geometric equations that should be satisfied are derived by combining the physical meanings of the imager observation, the vector equations are established by the installation and transfer relationship of each mechanical mechanism, and then the matrix equations are established by the dual-vector method. Secondly, the necessary conditions for the establishment of the matrix equation are analyzed. Through flexible use of the mathematical characteristics of "eigenvector", the installation of the series mechanical mechanism is decoupled, and a mathematical method for on-orbit calibration based on imager observation is obtained, extending the two-dimensional installation to the general case of n-dimensional installation, and giving a standard calculation process. Finally, the calibration algorithm is verified by mathematical simulation. At the same time, the influence of observation noise on the calibration method is simulated. The simulation results show that the method of decoupling calibration using "eigenvector" is effective and accurate.
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