中国科技核心期刊

中文核心期刊

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空间控制技术与应用

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EKF/UKF在编队飞行卫星GPS相对导航中的应用

楚瑞   

  1. 西安邮电学院电子与信息工程系
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-10-25 发布日期:2008-10-25

Application of EKF/UKF in the GPS Relative Navigation for Formation Flying of Spacecrafts

CHU Rui   

  1. Department of Electronics and Information Engineering;Xi’an Institute of Post & Telecommunications;Xi’an;710121
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-10-25 Published:2008-10-25

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。

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

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 reliability.

Key words: extended Kalman filter, unscented Kalman filter, carrier differential global position system, spacecrafts formation flying, relative navigation

中图分类号: 

  • TN967.1