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http://dx.doi.org/10.5139/JKSAS.2017.45.10.836

Sun Sensor Aided Multiposition Alignment of Lunar Exploration Rover  

Cha, Jaehyuck (Department of Mechanical and Aerospace Engineering/ASRI Seoul National University)
Heo, Sejong (Department of Mechanical and Aerospace Engineering/ASRI Seoul National University)
Park, Chan-Gook (Department of Mechanical and Aerospace Engineering/ASRI Seoul National University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.45, no.10, 2017 , pp. 836-843 More about this Journal
Abstract
In lunar exploration, the necessity of utilizing rover is verified by the examples of the Soviet Union and China and the similar Mars missions of the United States. In order to achieve the successful management of a lunar rover, a high precision navigation technique is required, and accordingly, high precision initial alignment is essential. Even though it is general to perform initial alignment in a steady state, a multiposition alignment technique is applied when high performance is needed. On the lunar surface, however, the performance of initial alignment decreases from that on Earth, and it cannot be improved by applying multiposition alignment method owing to certain constraints of lunar environment. In this paper, a sun sensor aided multiposition alignment technique is proposed. The measurement model for a sun vector is established, and its observability analysis is performed. The performance of the proposed algorithm is verified through computer simulations, and the results show the estimation performance is improved dramatically.
Keywords
Multiposition Alignment; Sun Sensor; Lunar Exploration Rover;
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