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http://dx.doi.org/10.5139/JKSAS.2017.45.9.734

Requirement Analysis of Navigation System for Lunar Lander According to Mission Conditions  

Park, Young Bum (Department of Mechanical and Aerospace Engineering, Seoul National University)
Park, Chan Gook (Department of Mechanical and Aerospace Engineering, Seoul National University)
Kwon, Jae Wook (Korea Aerospace Research Institute)
Rew, Dong Young (Korea Aerospace Research Institute)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.45, no.9, 2017 , pp. 734-745 More about this Journal
Abstract
The navigation system of lunar lander are composed of various navigation sensors which have a complementary characteristics such as inertial measurement unit, star tracker, altimeter, velocimeter, and camera for terrain relative navigation to achieve the precision and autonomous navigation capability. The required performance of sensors has to be determined according to the landing scenario and mission requirement. In this paper, the specifications of navigation sensors are investigated through covariance analysis. The reference error model with 77 state vector and measurement model are derived for covariance analysis. The mission requirement is categorized as precision exploration with 90m($3{\sigma}$ ) landing accuracy and area exploration with 6km($3{\sigma}$ ), and the landing scenario is divided into PDI(Powered descent initiation) and DOI(Deorbit initiation) scenario according to the beginning of autonomous navigation. The required specifications of the navigation sensors are derived by analyzing the performance according to the sensor combination and landing scenario.
Keywords
Lunar lander; Navigation system; Covariance analysis; Requirement analysis;
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Times Cited By KSCI : 1  (Citation Analysis)
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