观测轮廓显著性耦合时的轨道根数反演方法  

An Orbital Elements Inversion Method for the Coupling Significance of Observed Pulse

作　　者：苏剑宇 方海燕 高敬敬 SU Jianyu;FANG Haiyan;GAO Jingjing(School of Aerospace Science and Technology,Xidian University,Xi’an 710126,China)

机构地区：[1]西安电子科技大学空间科学与技术学院,西安710126

出　　处：《宇航学报》2022年第12期1696-1707,共12页Journal of Astronautics

基　　金：临近空间飞行器测控及特种测量技术联合研究中心基金(20200105)。

摘　　要：针对脉冲轮廓显著性数据耦合情况下无法直接根据显著性数据反演轨道根数的问题,提出了一种根据脉冲轮廓显著性数据的方差特征进行解耦,并逐步实现轨道六根数估计的方法。利用X射线脉冲星实测数据完成了基于观测轮廓显著性数据方差特征的导航验证,实验结果表明根据显著性数据的方差特征可逐次解耦显著性数据,并以方差最小准则得到轨道根数的估计值,且定位误差为7.31 km。本文方法既不依赖标准脉冲轮廓,同时适用于轨道六根数均存在偏差的实际情况,在X射线脉冲星导航的实际应用中更具优势。In the case of pulse profile significance data coupling,it is impossible to directly invert the orbit elements based on significance data.To solve this problem,a decoupling method based on the variance characteristics of pulse profile significance data is proposed,by which the estimation of the six orbital elements is gradually realized.The navigation verification based on the variance characteristics of the observed pulse profile significance data is completed by using the observational data of X-ray pulsar.The experimental results show that the significance data can be decoupled step by step according to the variance characteristics of the significance data,and the estimated value of the orbital elements can be obtained by the criterion of minimum variance.The positioning error is 7.31 km based on the estimated orbital elements.The proposed method does not depend on the standard pulse profile,and is suitable for the actual situation that the deviations exist in the six orbital elements,because of which it has more advantages in the practical application of X-ray pulsar navigation.

关 键 词：轨道六根数 X射线脉冲星导航 观测轮廓 

分 类 号：V448.23[航空宇航科学与技术—飞行器设计]