X射线脉冲星敏感器与加表组合天文导航及漂移估计  

Integrated celestial navigation and drift estimation based on accelerometers and x-ray pulsar sensor

作　　者：王献忠 WANG Xianzhong(Shanghai Aerospace Technology Academy,Shanghai 201109,China)

机构地区：[1]上海航天技术研究院,上海201109

出　　处：《航天控制》2025年第1期68-72,共5页Aerospace Control

摘　　要：研究基于PI滤波估计加速度漂移的X射线脉冲星敏感器与加表组合导航算法。因长时间惯导误差积累导致发散,X射线脉冲星敏感器不能实时定位,且不能确定速度,提出利用X射线脉冲星敏感器脉冲到达时间(Time of arrival,TOA)作为观测量,与惯导推算的航天器位置在脉冲星指向上的投影估计位置误差,基于PI滤波估计加速度漂移,修正惯导误差,通过组合导航连续确定位置/速度。仿真表明,基于X射线脉冲星敏感器相位ϕ与加表组合天文导航算法能有效估计加速度漂移,并给出较高精度的位置/速度。The algorithm of the integrated celestial navigation combined accelerometers with X-ray pulsar sensor is researched.Firstly,the inertial navigation algorithm is provided for spacecraft based on the heliocentric inertial reference frame,and the accelerometer drift is estimated by the phase difference of the inertial navigation and X-ray pulsar sensor in pulsar direction based on PI filter.Then,the algo⁃rithm of the integrated celestial navigation combined X-ray pulsar sensor with accelerometers based on the time of arrival(TOA)of the pulsar pulse is proved.Lastly,simulation results show that the algorithm of the integrated celestial navigation is effective.

关 键 词：组合天文导航 PI滤波估计 加表漂移估计 X射线脉冲星敏感器 

分 类 号：P128.4[天文地球—天体测量]