| EKF/UKF在编队飞行卫星GPS相对导航中的应用 |
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| 引用本文： | 楚瑞.EKF/UKF在编队飞行卫星GPS相对导航中的应用[J].空间控制技术与应用,2008,34(5):57-60. |
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| 作者姓名： | 楚瑞 |
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| 作者单位： | 西安邮电学院电子与信息工程系,西安,710121 |
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| 摘 要： | 航天器编队飞行协调工作,必须精确确定各航天器的相对位置和相对速度,即进行编队飞行相对导航。将扩展卡尔曼滤波(EKF,extended Kalman filter)和非线性滤波unscented Kalman filter(UKF)算法同时应用于编队飞行卫星的载波相位差分GPS相对导航。EKF与UKF算法原理不同,UKF算法的精度比EKF的精度高。在实际应用中,可以将两种算法组成互为备份的相对导航滤波器,这样可提高滤波系统冗余性能。
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| 关 键 词： | 扩展卡尔曼滤波 UKF 载波相位差分GPS 编队飞行卫星 相对导航
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Application of EKF/UKF in the GPS Relative Navigation for Formation Flying of Spacecrafts |
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| CHU Rui.Application of EKF/UKF in the GPS Relative Navigation for Formation Flying of Spacecrafts[J].Aerospace Contrd and Application,2008,34(5):57-60. |
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| Authors: | CHU Rui |
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| Institution: | Department of Electronics and Information Engineering;Xi’an Institute of Post &; Telecommunications;Xi’an;710121 |
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| Abstract: | Accurate relative position and velocity determination are required for formation flying of spacecrafts.The comparison of EKF and UKF algorithms for relative navigation based on carrier differential global position system for formation flying is given in this paper.Simulation results indicate that the UKF has better accurate but longer computation time than the EKF since difference of filter's principles.Both filters are used in practical application for consideration of navigation system redundancy and reli... |
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| Keywords: | extended Kalman filter unscented Kalman filter carrier differential global position system spacecrafts formation flying relative navigation |
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