中国空间科学技术

›› 2014, Vol. 34 ›› Issue (1): 50-56.doi: 10.3780/j.issn.1000-758X.2014.01.007

• 研究探讨 • 上一篇    下一篇

一种KBR系统相位中心在轨标定算法

辛宁1,2, 邱乐德2, 张立华1, 丁延卫1   

  1. （1 航天东方红卫星有限公司，北京 100094） （2 中国空间技术研究院，北京 100094）
  • 收稿日期:2013-03-27 修回日期:2013-08-05 出版日期:2014-02-25 发布日期:2014-02-25
  • 作者简介:辛 宁, 1982年生，2007年毕业于烟台大学信号与信息处理专业，现为中国空间技术研究院飞行器设计专业博士研究生。研究方向为重力卫星总体设计。
  • 基金资助:

    国家自然科学基金（41274041）资助项目

An On-orbit Calibration Method of KBR Phase Center

IN Ning1.2, QIU Le-de2, ZHANG Li-hua1, DING Yan-wei1   

  1. (1 DFH Satellite Co.Ltd，Beijing 100094) (2 China Academy of Space Technology，Beijing 100094)
  • Received:2013-03-27 Revised:2013-08-05 Published:2014-02-25 Online:2014-02-25

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摘要： 为了保证低低跟踪(SST-LL)重力卫星K波段微波测距（KBR）系统在轨测距精度，提出了一种KBR系统相位中心在轨标定算法。首先根据卫星姿态机动律设计了一种姿态控制算法，将卫星姿态控制分为喷气机动控制过程和稳定控制过程，然后将卫星稳定控制过程中的KBR、GPS及星敏感器观测数据代入扩展卡尔曼滤波器中估计出KBR系统相位中心的位置。最后进行了数学仿真验证,结果表明该算法能够对标定过程中的卫星姿态进行稳态控制，姿态稳定控制精度俯仰、偏航优于1mrad，滚动优于3mrad|双星KBR相位中心三轴标定精度均控制在1mm以内，具有良好的稳定精度。

关键词: K波段微波测距系统, 相位中心, 在轨标定, 姿态控制, 扩展卡尔曼滤波, 重力卫星

Abstract: An algorithm for on-orbit calibration of K band ranging (KBR) system phase center of the low-low satellite-to-satellite tracking (SST-LL) gravity satellite was proposed. Firstly, the attitude control algorithm was designed according to the calibration maneuver design, and the satellite control procedure was divided into thruster maneuver control procedure and stabilization control procedure. Secondly, the observation of KBR, GPS and star sensor were used to estimate the phase center of KBR based on extended Kalman filter. The pitch and yaw attitude control error are better than 1mrad, and the roll error is better than 3mard which indicates that the calibration attitude stabilization control can be realized. The calibration accuracy of three axises are all better than 1mm, which verify the fast convergence rate and the steady accuracy of the algorithm.

Key words: K band ranging system, Phase center, On-orbit calibration, Attitude control, Extended Kalman filter, Gravity satellite