| 一种用于实时轨道确定的NPF-SRCKF滤波算法 |
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| 引用本文： | 李志军,侯黎强.一种用于实时轨道确定的NPF-SRCKF滤波算法[J].宇航学报,2014,35(7):811-817. |
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| 作者姓名： | 李志军 侯黎强 |
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| 作者单位： | 1.西安卫星测控中心宇航动力学国家重点实验室，西安 710043；
2. 西安交通大学电子信息工程学院，西安 710049 |
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| 摘 要： | 针对航天器实时轨道确定中建模复杂、计算量大、估计精度低的问题，设计了一种考虑地球J 2 摄动影响的基于NPF-SRCKF的实时轨道确定算法，该算法采用非线性预测滤波(NPF)对模型误差进行补偿修正，利用平方根容积卡尔曼滤波(SRCKF)算法对修正模型误差后的系统进行状态估计。针对单测站、双测站跟踪测量设计了不同的实时轨道确定算法。实验结果显示，将非线性预测滤波和平方根容积卡尔曼滤波结合在一起，运用于简化的实时轨道确定模型，能有效降低计算复杂度，改进数值运算的稳定性，提高状态估计的精度。
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| 关 键 词： | 实时轨道确定 非线性预测滤波 平方根容积卡尔曼滤波 |
| 收稿时间： | 2013-04-14 |
An Improved NPF-SRCKF Based Algorithm for Spacecraft Orbit Determination |
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| LI Zhi jun,HOU Li qiang.An Improved NPF-SRCKF Based Algorithm for Spacecraft Orbit Determination[J].Journal of Astronautics,2014,35(7):811-817. |
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| Authors: | LI Zhi jun HOU Li qiang |
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| Institution: | 1.State Key Laboratory of Astronautic Dynamics，Xi’an Satellite Control Center，Xi’an 710043，China；
2. School of Electronic and Information Engineering，Xi’an Jiaotong University， Xi’an 710049，China |
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| Abstract: | A NPF-SRCKF based algorithm taking into account J 2 perturbation is proposed for spacecraft orbit determination. In this method, Nonlinear Predictive Filter (NPF) is used for correcting the model error, while Square Root Cubature Kalman Filter (SRCKF) is performed for estimating the states with the model correted by NPF. To illustrate effectiveness of the method, two test cases are designed for the orbit determination by use of data from single ground station and double stations. Simulation results show that combined improved NPF with SRCKF, the method proposed in this paper can reduce the complexity of the computation, and make the data processing procedure more robust and accurate. |
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| Keywords: | Orbit determination Nonlinear predictive filter Square0-root cubature Kalman filter |
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