RTS平滑滤波在事后姿态确定中的应用  

The Application of RTS Smooth Filter Algorithm in Post Attitude Determination

作　　者：鲍雨波 宗红[1,2] 张春青[1,2] 

机构地区：[1]北京控制工程研究所,北京100190 [2]空间智能控制技术重点实验室,北京100190

出　　处：《空间控制技术与应用》2015年第3期18-22,共5页Aerospace Control and Application

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.To raise the precision of post attitude determination, the rauch tung striebel （RTS） filter algo- rithm is introduced based on EKF. Currently the errors are usually used as state variables in EKF to de- termine 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.

关 键 词：星敏感器 陀螺 事后姿态确定 RTS平滑滤波 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]