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基于脉冲星和太阳敏感器的日地系Halo轨道组合导航研究

Keywords: 脉冲星,太阳敏感器,Halo轨道,二级微分修正,组合导航

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Abstract:

为提高平动点轨道探测器的自主导航能力,提出一种利用X射线脉冲星和太阳敏感器的导航算法.利用X射线脉冲星导航理论,用X射线探测器测量X射线脉冲到达时间,同时利用太阳敏感器测量太阳视线方向矢量,建立导航系统观测方程.在高精度星历模型下,对日地系Halo轨道建立数学模型,利用二级微分修正方法获取地球质心惯性系下的标称轨道,利用基于UD分解的联邦Unscented卡尔曼滤波方法进行状态估计,并研究了摄动因素对导航结果的影响.仿真结果表明,该方法能够完成日地系平动点轨道的自主导航,并且比X射线脉冲星单独导航具有更高的导航精度.

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