中国科技核心期刊

中文核心期刊

CSCD来源期刊

空间控制技术与应用 ›› 2015, Vol. 41 ›› Issue (3): 18-22.doi: 10.3969/j.issn.1674-1579.2015.03.004

• 学术研究 • 上一篇    下一篇

RTS平滑滤波在事后姿态确定中的应用

  

  • 出版日期:2015-06-24 发布日期:2015-07-09

The Application of RTS Smooth Filter Algorithm in Post Attitude Determination

  • Online:2015-06-24 Published:2015-07-09

摘要: 为了进一步提高卫星事后姿态确定的精度,基于EKF引入RTS后向平滑滤波.针对目前广泛使用的以误差作为状态变量的EKF姿态确定方法,不改变原有的EKF方法,通过对EKF过程中得到的数据做相应处理,在保证不出现协方差阵奇异的情况下,成功地将RTS平滑滤波算法应用到事后姿态确定中,并用RTS平滑滤波算法进行了仿真.仿真结果表明,RTS平滑滤波的姿态确定精度明显优于EKF.

关键词: 星敏感器, 陀螺, 事后姿态确定, RTS平滑滤波

Abstract: To raise the precision of post attitude determination, the rauch tung striebel (RTS) filter algorithm is introduced based on EKF. Currently the errors are usually used as state variables in EKF to determine the attitude. Via calculating the data obtained from EKF, the RTS smooth filter is successfully applied to post attitude determination, and at the same time, the singularity of the error covariance matrix is evitable. The simulation results indicate that the RTS smooth filter algorithm is significantly better than EKF in post attitude determination.

Key words: star sensor, gyro, post attitude determination, RTS smooth filter algorithm

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