| 磁暴期间的地磁导航精度分析 |
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| 引用本文： | 郭才发,张力军,蔡洪.磁暴期间的地磁导航精度分析[J].空间科学学报,2011,31(3):372-377. |
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| 作者姓名： | 郭才发 张力军 蔡洪 |
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| 作者单位： | 国防科学技术大学航天与材料工程学院, 长沙410073 |
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| 基金项目： | 国防科学技术大学优秀研究生创新项目资助 |
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| 摘 要： | 地磁导航是无源自主导航技术研究的新方向. 分析了地磁导航的基本原理, 描述了典型磁暴过程, 并针对地磁导航在磁暴环境中的适用性进行了研究. 在采用曲面样条方法对实测地磁场数据建立观测模型的基础上, 结合广义卡尔曼滤波方法讨论了磁暴不同阶段对地磁导航精度造成的影响. 分别采用理论典型磁暴数据以及实测磁暴数据进行仿真, 仿真结果表明, 在磁暴的初相、恢复相的中后时段以及中等强度以下的磁暴全过程仍然可以采用地磁来进行导航定位, 导航精度在200 m以内, 满足飞行器中程制导的精度要求.
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| 关 键 词： | 地磁导航 磁暴 曲面样条 广义卡尔曼滤波 |
| 收稿时间： | 1900-01-01 |
Analysis of Geomagnetic Navigation Accuracy Under Magnetic Storms |
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| GUO Caifa,ZHANG Lijun,CAI Hong.Analysis of Geomagnetic Navigation Accuracy Under Magnetic Storms[J].Chinese Journal of Space Science,2011,31(3):372-377. |
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| Authors: | GUO Caifa ZHANG Lijun CAI Hong |
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| Institution: | College of Aerospace and Material Engineering, National University of Defense Technology, Changsha 410073 |
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| Abstract: | Geomagnetic navigation is a new branch of the passive autonomous navigation technique. The theory of geomagnetic navigation was analyzed.The process of typical magnetic storm is described.The feasibility of geomagnetic navigation during magnetic storms is analyzed in this paper.With employment of experimental data,the measurement equations are obtained by using surface Spline method.Extended Kalman Filter(EKF)is applied to navigation calculation,and the navigation accuracy is discussed during different phas... |
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| Keywords: | Geomagnetic navigation Magnetic storm Surface Spline Extended Kalman Filter(EKF) |
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