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给出一种利用X射线脉冲星的平动点轨道自主导航算法.分析了X射线脉冲星导航原理,以脉冲到达时间差值为基本观测量,建立导航系统观测方程.在高精度星历模型下,对日地系L_1点Halo轨道建立数学模型,利用基于UD分解的无迹卡尔曼滤波方法进行导航定位,并研究了摄动因素对导航结果的影响.仿真结果表明,在日地系平动点轨道的自主导航中,X射线脉冲星导航是可行的.
An independent navigation algorithm of orbiting point orbit using X-ray pulsar is presented. The principle of X-ray pulsar navigation is analyzed, and the observational equation of pulse arrival time is taken as the basic observation to establish the observational equation of the navigation system.In high-precision ephemeris model , The mathematic model of Halo orbit of L_1 point of Japan-Earth system is established, and the unscented Kalman filter method based on UD decomposition is used for navigation and positioning, and the influence of perturbation factors on the navigation results is studied. The simulation results show that, In autonomous navigation of moving point orbit, X-ray pulsar navigation is feasible.