| 一种新的综合Kalman滤波及其在星载GPS低轨卫星定轨中的应用 |
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| 引用本文： | 韩保民, 欧吉坤, 曲国庆. 一种新的综合Kalman滤波及其在星载GPS低轨卫星定轨中的应用[J]. 武汉大学学报 ( 信息科学版), 2005, 30(6): 493-496. |
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| 作者姓名： | 韩保民 欧吉坤 曲国庆 |
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| 作者单位： | 1 山东理工大学建筑工程学院,淄博市张店区张周路12号,255049;2 中国科学院测量与地球物理研究所,武汉市徐东路174号,430077 |
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| 基金项目： | 国家自然科学基金资助项目(40074003)，中国科学院测量与地球物理研究所百人计划资助项目。 |
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| 摘 要： | 针对将Kalman滤波方法应用到星载GPS定轨时,由于动态噪声和观测噪声确定不准而造成滤波的发散、污染观测值造成Kalman滤波估值的扭曲及计算舍入误差可能带来协方差阵的不正定性等缺陷,提出了一种新的综合Kalman滤波方法。该方法用拟准检定法准确地探测和修正量测方程中存在的粗差;用UD分解算法克服了数值的不稳定性,改进了计算精度;用Sage自适应滤波器克服滤波器的发散。算例结果表明,这种综合卡尔曼滤波方法具有数值稳定性好、较强的自适应性和较好地削弱粗差影响等优点。
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| 关 键 词： | 星载GPS 低轨卫星定轨 综合Kalman滤波 |
| 文章编号： | 1671-8860(2005)06-0493-04 |
| 收稿时间： | 2005-03-31 |
| 修稿时间： | 2005-03-31 |
A Comprehensive Kalman Filtering and Its Application to GPS-based Orbit Determination for LEOs |
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| HAN Baomin, OU Jikun, QU Guoqing. A Comprehensive Kalman Filtering and Its Application to GPS-based Orbit Determination for LEOs[J]. Geomatics and Information Science of Wuhan University, 2005, 30(6): 493-496. |
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| Authors: | HAN Baomin OU Jikun QU Guoqing |
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| Affiliation: | 1Shandong University of Technology, 12 Zhangzhou Road, Zhangdian District, Zibo 255049, China;2 Institute of Geodesy and Geophysics, CAS, 174 Xudong Road, Wuhan 430077, China |
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| Abstract: | In applying typical Kalman filtering technique to the optimal estimation of motion state of LEOs, there are some limitations, such as divergence of filter because of inaccurate of dynamic noise and observation noise, distortion of estimation of Kalman filter caused by measurement pollution and being not positive definite of covariance matrix due to computing rounding errors. In order to cope with these limitations, a comprehensive Kalman filter is presented in this paper. This filter is a combination of adaptive UD decomposition Kalman filter with QUAD method. It applies the QUAD method to detect and correct the gross errors in observations, uses UD decomposition technique to improve computation precision and overcome the instability of filter caused by instability of values. |
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| Keywords: | PS-based orbit determination for LEOs comprehensive Kalman filter QUAD |
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