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### 环月探测器自主天文导航系统的可观度分析

1. 北京控制工程研究所,北京控制工程研究所,北京控制工程研究所 北京 100080,北京 100080,北京 100080
• 发布日期:2007-12-25

### Analysis of Observable Degree in Autonomous Celestial Navigation System of Lunar Orbiter

Liu Ping Wang Dayi Huang Xiangyu (Beijing Institute of Control Engineering,Beijing 100080)

• Published:2007-12-25

Abstract: An autonomous orbit determination system based on two angles and selenocentric distance was studied.One angle was between the lines of sight to a star and selenocentric direction, and the other was between the sun and selenocentric direction.A modified observability analysis method defined by the spectral function was presented through the study on some nonlinear system. And the relationship between the observable degree and the accuracy of the system was proved.The simulation resalts show that the modified method is feasible.