| 基于X射线脉冲星的新型卫星天文导航 |
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| 引用本文： | 乔黎,刘建业,郑广楼,贺亮,熊智.基于X射线脉冲星的新型卫星天文导航[J].南京航空航天大学学报(英文版),2008,25(2). |
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| 作者姓名： | 乔黎 刘建业 郑广楼 贺亮 熊智 |
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| 作者单位： | 1. 南京航空航天大学自动化学院,南京,210016,中国
2. 上海航天控制工程研究所,上海,200233,中国 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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江苏省研究生科研创新计划
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南京航空航天大学校科研和教改项目 |
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| 摘 要： | 基于X射线脉冲星导航（XNAV）是一种新型的卫星自主导航技术。使用卫星上的相位测量值和脉冲星钟预报的相位值，可以确定卫星的位置和速度。由探测到的脉冲相位，计算出沿着脉冲星视线方向的卫星相对于地心的距离。同时测量三颗脉冲星，就可以计算出卫星在惯性系下的位置。结合距离测量方程和轨道动力学，设计了广义卡尔曼滤波算法。仿真验证表明，该导航算法能实现卫星的精确导航，定轨精度在百米以内。此外还分析了影响导航性能的因素。
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| 关 键 词： | 导航 卡尔曼滤波 X射线脉冲星 |
NOVEL CELESTIAL NAVIGATION FOR SATELLITE USING X-RAY PULSARS |
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| Qiao Li,Liu Jianye,Zheng Guanglou,He Liang,Xiong Zhi.NOVEL CELESTIAL NAVIGATION FOR SATELLITE USING X-RAY PULSARS[J].Transactions of Nanjing University of Aeronautics & Astronautics,2008,25(2). |
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| Authors: | Qiao Li Liu Jianye Zheng Guanglou He Liang Xiong Zhi |
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| Abstract: | The X-ray pulsar-based navigation is a novel technology for the satellite autonomous navigation.Theposition and the velocity of the satellite are deterimined hy using the pulse phases detected at the satellite and pre-dicted by the pulse timing models.With the detected pulse phase,the satellite position with respect to the Earthcenter can be calculated along the line-of-sight to the pulsar.Using three pulsars,the satellite position in the in-ertial frame can be resolved.The extended Kalman filter (EKF) algorithm is designed to incorporate the rangemeasurements with the satellite dynamics.Simulation verification shows that the proposed algorithm can accu-rately determine the satellite orbit,with the position error less than 100 m.Furthermore,the factors influencingthe navigation performance are also discussed. |
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| Keywords: | navigation Kalman filtering X-ray pulsar |
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