基于抗差UD分解滤波的导航星座整网定轨方法  

Integrated orbit determination of navigation constellation based on the robust UD factorization filter

作　　者：朱俊[1] 文援兰[1] 陈忠贵[1,2] 廖瑛[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,湖南长沙410073 [2]中国空间技术研究院,北京100094

出　　处：《系统工程与电子技术》2010年第6期1299-1304,共6页Systems Engineering and Electronics

基　　金：国家高技术研究发展计划(863计划)(2007AA12Z308);国家部委预研基金(9140A21060107KG0173)资助课题

摘　　要：针对我国导航星座的自主定轨问题,提出基于抗差UD(upper triangular matrix-diagonal matrix)分解滤波的导航星座整网定轨方法。该方法对卫星轨道参数进行整网估计,通过对所有观测资料加权以避免观测粗差的影响,并利用UD分解算法来避免对协方差矩阵的直接求逆而导致的计算机舍入误差过大从而滤波发散。推导了整网定轨的数学模型,给出了抗差UD分解滤波的详细步骤。通过性能分析和仿真计算表明了该方法的可行性与有效性。To realize the autonomous orbit determination of the compass navigation satellite system（CNSS）,a method of integrated orbit determination of the navigation constellation net based on the robust UD factorization filter is proposed.The satellites＇ orbit parameters are estimated for a whole navigation constellation net.The observations are authoritied to avoid the effect of the gross error,and the UD factorization filter is used to overcome the instability of filter caused by accumulation of the rounding error.The mathematical model of integrated orbit determination is derived,and the steps of the robust UD factorization filter is presented in detail.Finally,the performance analysis and simulation results indicate the feasibility and validity of this method.

关 键 词：自主定轨 抗差UD分解滤波 导航星座 整网估计 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]