脉冲星方向误差及空间分布对相对导航的影响

doi:10.3969/j.issn.1001-2400.2017.01.016

西安电子科技大学学报

脉冲星方向误差及空间分布对相对导航的影响

薛梦凡;李小平;方海燕;孙海峰;沈利荣

(西安电子科技大学空间科学与技术学院，陕西西安 710071)

收稿日期:2015-11-16 出版日期:2017-02-20 发布日期:2017-04-01
通讯作者: 方海燕(1974-)，女，副教授，E-mail: hyfang@xidian.edu.cn
作者简介:薛梦凡(1990-)，女，西安电子科技大学博士研究生，E-mail: xuemfxd@126.com
基金资助:
国家基础研究计划(973计划)资助项目(2014CB340205)；空间测控通信探索基金资助项目(201405B)

Influence of the pulsar direction error and geometry distribution on spacecraft relative navigation

XUE Mengfan;LI Xiaoping;FANG Haiyan;SUN Haifeng;SHEN Lirong

(School of Aerospace Science ＆ Technology, Xidian Univ., Xi'an 710071, China)

Received:2015-11-16 Online:2017-02-20 Published:2017-04-01
Contact: FANG Haiyan

摘要/Abstract

摘要：

X射线脉冲星导航是实现航天器长时间自主相对导航的有效手段之一．文中从X射线脉冲星相对导航卡尔曼滤波的观测方程出发，研究了脉冲星方向误差及空间分布对导航精度的影响，其中通过将方向误差转化为观测量误差对脉冲星方向误差进行建模，并推导了脉冲星组空间分布与导航精度的关系．卡尔曼滤波仿真结果表明: 脉冲星方向误差在1000acs以内时，滤波偏差随方向误差的增大而线性增大，1acs方向误差引入的距离偏差最大为0.34％；星组空间分布对导航精度的影响较大，从8颗星中任选4颗星进行导航时，距离估计精度相差达10.74％．

关键词: 相对导航, X射线脉冲星, 导航精度, 方向误差

Abstract:

X-ray pulsar navigation is one of the effective means to realize the spacecraft relative navigation. Based on the Kalman filtering measurement model of X-ray pulsar based relative navigation, the effect of pulsar direction error and geometry distribution on navigation accuracy is researched. To model the pulsar direction error, a method of translating the model error into the measurement error is proposed. Simulation results indicate that the relative distance deviation caused by pulsars direction errors of 1arcsec is up to 0.34％ and that it increases linearly with the actuating direction error when the direction error is within 1000arcsec. The effect of the pulsar geometry distribution on navigation precision is remarkable. Selecting 4 pulsars from 8 for navigation, the discrepancy of navigation precision reaches 10.74％.

Key words: relative navigation, X-ray pulsar, navigation precision, direction error

薛梦凡;李小平;方海燕;孙海峰;沈利荣. 脉冲星方向误差及空间分布对相对导航的影响[J]. 西安电子科技大学学报, 2017, 44(1): 89-93.

XUE Mengfan;LI Xiaoping;FANG Haiyan;SUN Haifeng;SHEN Lirong. Influence of the pulsar direction error and geometry distribution on spacecraft relative navigation[J]. Journal of Xidian University, 2017, 44(1): 89-93.

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[3]	刘秀平;李小平;孙海峰;方海燕. 利用Bayesian多尺度模型的X射线脉冲星信号估计[J]. J4, 2013, 40(4): 90-95.

脉冲星方向误差及空间分布对相对导航的影响

Influence of the pulsar direction error and geometry distribution on spacecraft relative navigation

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