基于N-EKF的非合作低轨目标双星无源定位跟踪算法  

Double satellite borderless location and tracking algorithm for non-cooperative low orbit target based on N-EKF

作　　者：李罗钢 路鹰 晁鲁静 任金磊 LI Luogang;LU Ying;CHAO Lujing;REN Jinlei(China Academy Aerospace Science and Innovation,Beijing 100088,China)

机构地区：[1]中国航天科技创新研究院,北京100088

出　　处：《系统工程与电子技术》2024年第5期1777-1782,共6页Systems Engineering and Electronics

摘　　要：针对两颗天基光学卫星对低轨非合作目标进行无源定位跟踪的问题,提出了一种基于Newton迭代与扩展卡尔曼滤波(Newton iteration and extended Kalman filter,N-EKF)的定位跟踪算法。首先,将基于角度测量信息的双星观测模型转化为双直线公垂线中点问题,并进一步转化为非线性方程问题,使用Newton迭代算法得到非合作目标的初始定位信息。然后,采用扩展卡尔曼滤波(extended Kalman filter,EKF)方法,在初始定位信息基础上,结合近地轨道动力学模型,实现对非合作在轨目标的精确跟踪滤波。最后,通过仿真验证了所提方法的可行性及优势。Aiming at the problem of location and tracking non-cooperative low orbit target in two satellites case,an location and tracking algorithm based on the Newton iteration and extended Kalman filter(N-EKF)is proposed.Firstly,the double satellite observation model based on angle measurement information is transformed into two straight lines perpendicular midpoint problem,which is further transformed into non-linear equations problem.The Newton iterative algorithm is used to calculate the initial location information of the non-cooperative target.Then,based on initial positioning information,extended Kalman filter(EKF)and the near-earth orbit dynamic model are used to achieve the precise tracking filter of the non-cooperative in-orbit target.Finally,simulation result verifies the feasibility and advantages of the proposed method.

关 键 词：双星 无源定位 非合作低轨目标 跟踪滤波 

分 类 号：V212[航空宇航科学与技术—航空宇航推进理论与工程]