| 自适应滤波在磁暴期间地磁导航中的应用 |
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| 引用本文： | 郭才发,胡正东,赵星,蔡洪.自适应滤波在磁暴期间地磁导航中的应用[J].宇航学报,2010,31(8). |
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| 作者姓名： | 郭才发 胡正东 赵星 蔡洪 |
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| 作者单位： | 1. 国防科技大学航天与材料工程学院,长沙,410073
2. 北京华航无线电测量研究所,北京,100013 |
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| 摘 要： | 对磁暴期间巡航导弹巡航段的地磁导航问题进行了讨论。针对地磁导航在磁暴期间常规卡尔曼滤波容易发散的问题,提出了一种基于Sage-Husa自适应卡尔曼滤波的地磁导航算法。该算法根据新息的变化自适应调整测量噪声矩阵,消除了磁暴影响,提高了滤波稳定性。仿真表明在选择合适的遗忘因子基础上,即使在磁暴最剧烈的时间段,采用自适应卡尔曼滤波仍能保证一定的精度,定位精度在200m以内,满足巡航导弹中程制导的精度要求。
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| 关 键 词： | 磁暴 地磁导航 自适应卡尔曼滤波 新息 遗忘因子 |
Application of Adaptive Filter in Geomagnetic Navigation under Magnetic Storms |
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| GUO Cai-fa,HU Zheng-dong,ZHAO Xing,CAI Hong.Application of Adaptive Filter in Geomagnetic Navigation under Magnetic Storms[J].Journal of Astronautics,2010,31(8). |
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| Authors: | GUO Cai-fa HU Zheng-dong ZHAO Xing CAI Hong |
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| Institution: | GUO Cai-fa1,HU Zheng-dong1,ZHAO Xing2,CAI Hong1(1.College of Aerospace and Material Engineering,National University of Defense Technology,Changsha 410073,China,2.Beijing Hua Hang Radio Measuring Institute,Beijing 100013,China) |
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| Abstract: | The issue of geomagnetic navigation under magnetic storms during missile cruising phase is discussed in this paper.To solve the divergence of conventional Kalman filter,a geomagnetic nauigation algorithm based on Sage-Husa adaptive Kalman filter is proposed.According to the change of innovation,the algorithm with stronger stability can eliminate the influence of magnetic storms by adjusting the measurement noise matrix adaptively.Simulation results show that the positioning error of the Sage-Husa adaptive a... |
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| Keywords: | Magnetic storm Geomagnetic navigation Adaptive Kalman filter Innovation Fading factor |
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