摘要
为提高X射线脉冲星自主导航系统的工程实用性,提出一种利用单X射线探测器的深空巡航段自主导航系统,以脉冲星的脉冲到达太阳系质心时间差值作为基本观测量,利用美国"深空一号"任务中的批处理加权最小二乘滤波算法,估计航天器的位置和速度.以"深空一号"任务星际巡航段轨道为例,进行了数学仿真,并分析了脉冲星个数、脉冲星测量数据批数及定轨周期对导航结果的影响,并同卡尔曼滤波方法进行了比较,仿真结果表明了该系统的可行性和有效性.
To improve the X-ray pulsar-based navigation(XNAV) practice performance in engineering,a novel navigation system using single X-ray detector is proposed.The fundamental observed quantity is the difference between the observed arrival time and the predicted arrival time of pulse.The batch weighted least square filter used in Deep Space 1 of USA is applied to estimate the position and velocity of the spacecraft in the interplanetary cruise phase.The condition of Deep Space 1 is adopted in the simulation.The influence of the factors such as number of pulsars,the batches of the measurement data and the orbit determination period,is analyzed in the simulation.The comparison between the batch weighted least square filter and the Kalman filter is made as well.The simulation results show that the proposed system is feasible and effective in the spacecraft interplanetary cruise phase.
出处
《空间控制技术与应用》
2012年第6期27-30,共4页
Aerospace Control and Application
基金
空间科学预先研究资助项目(XDA04074300)
关键词
自主导航
脉冲星
巡航段
加权最小二乘滤波
autonomous navigation
pulsar
interplanetary cruise
weighted least square filter
