| 基于自适应滤波的光谱畸变误差抑制方法 |
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| 引用本文： | 许俊,张伟,黄庆龙,陈晓.基于自适应滤波的光谱畸变误差抑制方法[J].上海航天,2020,37(4):96-102. |
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| 作者姓名： | 许俊 张伟 黄庆龙 陈晓 |
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| 作者单位： | 上海卫星工程研究所，上海201109;上海市深空探测技术重点实验室，上海201109 |
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| 基金项目： | 上海市科委科研计划项目(18DZ2272300) |
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| 摘 要： | 为降低天文光谱畸变误差对多普勒测速导航精度的影响,设计结合非线性Sage-Husa噪声估计器及抗差扩展卡尔曼滤波器(Robust Extend Kalman Filter,REKF)的自适应滤波算法。当系统模型可靠时,抗差滤波能够通过预测残差判断异常量测并降低其权重;当系统模型噪声先验信息不准确时,通过Sage-Husa噪声估计器估计系统噪声协方差阵Q阵,以保证抗差滤波的效果。此外,结合多普勒测速导航及X射线脉冲星导航进行组合导航,以提高位置估计精度。仿真结果表明,该算法能够在系统模型噪声先验信息不准确的情况下有效控制光谱畸变造成的量测误差对导航精度的影响。
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| 关 键 词： | 多普勒测速 抗差滤波 Sage-Husa滤波 光谱畸变 组合导航 |
| 收稿时间： | 2019/12/4 0:00:00 |
| 修稿时间： | 2020/2/10 0:00:00 |
Suppression Method for Measurement Error Caused by Spectral Distortion Based on Adaptive Filtering |
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| XU Jun,ZHANG Wei,HUANG Qinglong,CEHN Xiao.Suppression Method for Measurement Error Caused by Spectral Distortion Based on Adaptive Filtering[J].Aerospace Shanghai,2020,37(4):96-102. |
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| Authors: | XU Jun ZHANG Wei HUANG Qinglong CEHN Xiao |
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| Affiliation: | Shanghai Institute of Satellite Engineering, Shanghai 201109, China;Shanghai Key Laboratory of Deep Space Exploration Technology, Shanghai 201109, China |
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| Abstract: | In order to reduce the effects of the astronomical spectral distortion error on the accuracy of Doppler velocimetry navigation, an adaptive filtering algorithm is designed along with the nonlinear Sage-Husa noise estimator and the robust extended Kalman filter (REKF). When the system model is reliable, the robust filter can justify the abnormal measurement by predicting the residuals and reduce its weight. When the prior information of the system model noise is inaccurate, the system noise covariance matrix will be estimated by the Sage-Husa noise estimator to ensure the accuracy of the robust filter. In addition, the X-ray pulsar navigation is combined with the Doppler velocimetry navigation to improve the accuracy of position estimation. The simulation results show that the algorithm can effectively control the effects of the measurement error caused by spectral distortion on the navigation accuracy when the prior information of the system model noise is inaccurate. |
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| Keywords: | Doppler velocimetry robust filtering Sage-Husa filtering spectral distortion integrated navigation |
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