基于N-EKF的非合作低轨目标双星无源定位跟踪算法

doi:10.12305/j.issn.1001-506X.2024.05.30

摘要/Abstract

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。

关键词: 双星, 无源定位, 非合作低轨目标, 跟踪滤波

Abstract:

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.

Key words: double satellite, borderless location, non-cooperative low orbit target, tracking

中图分类号:

V212

李罗钢, 路鹰, 晁鲁静, 任金磊. 基于N-EKF的非合作低轨目标双星无源定位跟踪算法[J]. 系统工程与电子技术, 2024, 46(5): 1777-1782.

Luogang LI, Ying LU, Lujing CHAO, Jinlei REN. Double satellite borderless location and tracking algorithm for non-cooperative low orbit target based on N-EKF[J]. Systems Engineering and Electronics, 2024, 46(5): 1777-1782.

图/表 6

参考文献 19

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