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一种基于太阳自转轴观测角的新型天文导航方法
宁晓琳, 晁雯
北京航空航天大学 仪器科学与光电工程学院, 北京 100191
摘要:
针对太阳探测器,提出一种基于太阳自转轴观测角的新型天文导航方法,通过光谱仪测量太阳圆盘面边缘上两组连线互相垂直点的速度差值,建立速度差值与太阳自转轴观测角的数学模型,并以该观测角作为量测量来提供探测器的位置信息。仿真结果表明:相较于传统以太阳视方向作为量测量的导航方法,以太阳自转轴观测角作为量测量的新型天文导航方法的导航精度提高了17.4%。此外,还分析了测速敏感器精度、滤波周期和轨道倾角对导航性能的影响,为深空探测自主导航提供了新的理论与方法。
关键词:  太阳探测器;天文导航;太阳自转轴;速度差值
DOI:10.15982/j.issn.2095-7777.2019.04.003
分类号:
基金项目:国家自然科学基金资助项目(61503013,61722301);空间智能控制技术重点实验室开放基金资助项目(ZDSYS-2017-04)
A Novel Celestial Navigation Method Using Angle Relative to Solar Rotation Axis
NING Xiaolin, CHAO Wen
School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China
Abstract:
Based on Solar explorer,A celestial navigation method usingthe angle relative to Solar rotation axis is proposed for Solar explorers. Measuring the speed difference between two sets of mutually perpendicular points on the edge of the Solar surface by the spectrometers, a mathematical model for speed difference and the angle is established and the angle is used as a new measurement to provide position information of the explorer. The simulation results show that the position error of the proposed methodis reduced by 17. 4% compared with the traditional method using the sun line-of-sight vector measurement. In addition,the influence of the accuracy of speed sensor,the filter period as well as the orbit inclination are analyzed. It will provide a new way for autonomous navigation of deep space exploration.
Key words:  Solar explorer;celestial navigation;Solar rotation axis;speed difference