Autonomous navigation for lunar satellite with lunar oblateness correction

作者：Li Mao Deng^*; Jing Wu Xing; Huang Xiang Yu

来源：Journal of Astronautics, 2012, 33(7): 896-902.

DOI：10.3873/j.issn.1000-1328.2012.07.007

• Autonomous navigation
• Earth sensor
• Geometry constraints
• Imaging principle
• Lunar satellite
• Measurement Noise
• Navigation accuracy
• Oblate shape
• Oblateness
• Orientation information
• Position accuracy
• Sun sensor
• UV sensor

The accuracy of the lunar UV sensor is limited by the oblate shape of the moon. The imaging principle of the lunar UV sensor and the geometry constraints when the sensor detecting the lunar horizon edge are investigated in this paper. Based on the imaging principle, a lunar nadir vector determination method is investigated. Compared with other approaches in previous literatures, the lunar oblateness is considered in this algorithm. Thereafter, a scenario of autonomous navigation for a lunar satellite based on orientation information of Sun-Moon-Earth is presented by using this algorithm to correct lunar oblateness. Simulation results show that the navigation position accuracy can achieve 300 m (3σ) and velocity accuracy can achieve 0.6 m/s (3σ) under measurement noises of 0.02°(3σ) for the sun sensor, 0.05°(3σ) for the earth sensor, and 0.1°(3σ) for the moon sensor, and ensures navigation accuracy of lunar satellite.

• 出版日期2012