| 引用本文: | 李冬,易东云,程洪玮,等.低轨预警自由段弹道估计的多项式逼近算法.[J].国防科技大学学报,2011,33(4):48-50.[点击复制] |
| LI Dong,YI Dongyun,CHEN Hongwei,et al.A Polynomial Approximation Algorithm for Free-Fight Trajectory Estimation under the Early Warning of LEO Satellite[J].Journal of National University of Defense Technology,2011,33(4):48-50[点击复制] |
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| 低轨预警自由段弹道估计的多项式逼近算法 |
| 李冬1, 易东云1, 程洪玮2, 周伟3 |
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(1.国防科技大学 理学院，湖南 长沙 410073;2.北京跟踪与通信技术研究所，北京 100094;3.91708部队司令部自动化办，广东 广州 510320)
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| 摘要: |
| 低轨单星对自由段弹道的估计是天基预警系统需解决的关键技术之一。建立了低轨预警卫星对自由段弹道的观测模型，针对极大似然估计批处理算法的大
运算量问题，给出了一种多项式逼近算法，由观测数据的逼近多项式在一些特定采样点的值形成伪观测数据，以伪观测数据代替原观测数据进行弹道估计。仿真表明，精度与极大似然估计相当，运算量显著降低。 |
| 关键词: 低轨预警卫星 弹道估计 多项式逼近 |
| DOI： |
| 投稿日期：2011-01-17 |
| 基金项目:国家自然科学基金资助项目(60974124) |
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| A Polynomial Approximation Algorithm for Free-Fight Trajectory Estimation under the Early Warning of LEO Satellite |
| LI Dong1, YI Dongyun1, CHEN Hongwei2, ZHOU Wei3 |
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(1.College of Science, National Univ. of Defense Technology, Changsha 410073, China;2.Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China;3.Automatization Office of No.91708 Military Command, Guangzhou 510320, China)
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| Abstract: |
| The free-fight trajectory estimation by a single LEO satellite plays a key role in the space-based early warning system. An actual measurement function was established, and a polynomial approximation algorithm was proposed to reduce the computational amount of the batch algorithm of maximum-likelihood estimation (MLE). The approximate polynomial of the measurement function was evaluated at some deterministic instants to form pseudo measurement data. The raw measurement data were replaced by the pseudo ones to estimate the trajectory. The simulation results show that this new algorithm greatly reduces the computational amount, and can achieve the same accuracy performance as MLE. |
| Keywords: LEO early warning satellite trajectory estimation polynomial approximation |
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