基于虚拟观测值的X射线单脉冲星星光组合导航

发布时间：2018-03-24 05:28

本文选题：脉冲星　切入点：单探测器　出处：《北京航空航天大学学报》2016年06期

【摘要】：传统的X射线脉冲星导航系统需要同时观测3~4颗脉冲星,有效载荷的质量和功耗极大。因此,单探测器脉冲星导航技术是实现航天器利用X射线脉冲星导航的关键举措。针对单探测器脉冲星导航的可观测性弱和精度低等问题提出了基于虚拟观测值的X射线单脉冲星与星光集中式组合滤波的高精度导航方法,即在X射线脉冲星的长周期内增加与星光同时刻观测的虚拟观测值,以实现高精度的集中式组合滤波算法。同时提出了利用神经网络预测虚拟观测值方法,并与利用动力学递推的方法进行比较,精度可以达到10-7量级。仿真结果表明,该方法可大大提高单探测器的导航的可靠性,补偿由于探测器误差造成的导航误差,导航位置误差为259.79 m,同时有效地减小了导航系统的重量,为X射线脉冲星导航的工程实现提供了参考依据。
[Abstract]:The traditional X-ray pulsar navigation system needs to observe three or four pulsars at the same time. The mass and power consumption of the payload is extremely high. Single detector pulsar navigation technology is a key measure to realize spacecraft navigation using X-ray pulsars. Aiming at the problems of weak observability and low precision of single detector pulsar navigation, this paper puts forward a method of X-ray based on virtual observations. A High Precision Navigation method based on combined filtering of Line Monopulse and Starlight, In the long period of X-ray pulsars, the virtual observations at the same time as the stars are added to achieve a high precision combined filtering algorithm. A neural network method is proposed to predict the virtual observations. The simulation results show that this method can greatly improve the navigation reliability of a single detector and compensate for the navigation error caused by the error of the detector. The navigation position error is 259.79 m, and the weight of the navigation system is reduced effectively, which provides a reference for the engineering realization of X-ray pulsar navigation.
【作者单位】：北京航空航天大学宇航学院;北京航天自动控制研究所;
【基金】：国家自然科学基金(51275027)~~
【分类号】：V448.2

【相似文献】