Chinese Optics Letters, 2017, 15 (8): 081201, Published Online: Jul. 20, 2018  

Optimization method for star tracker orientation in the sun-pointing mode Download: 967次

Author Affiliations
1 Department of Precision Instrument, Tsinghua University, Beijing 100084, China
2 State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China
3 Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA
Abstract
The star tracker, an optical attitude sensor with high accuracy, is widely used in satellites for attitude determination and control. However, it is susceptible to the sunlight and the earthlight for application on satellites in the sun-synchronous orbit. Therefore, the suppression of the sunlight and the earthlight is important for the star tracker. In this Letter, a vector model is proposed to describe the relationship among the Sun, the Earth, and the satellite body, and, based on the equations of the boundary curves, the vector areas free from the sunlight and the earthlight in the body coordinate system of the satellite are derived. Meanwhile, the installation orientation of the star tracker and the corresponding exclusion angle of the earthlight are optimized. The simulation results indicate that the optimization method for the installation orientation and the exclusion angle of the star tracker is accurate and effective.

Geng Wang, Fei Xing, Minsong Wei, Ting Sun, Zheng You. Optimization method for star tracker orientation in the sun-pointing mode[J]. Chinese Optics Letters, 2017, 15(8): 081201.

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