惯性导航系统自适应辅助GNSS矢量跟踪方法  

Method of INS-Aided GNSS Adaptive Vector Tracking

作　　者：李传军[1] 彭钟锋 李兴城[1] 

机构地区：[1]北京理工大学宇航学院飞行器动力学与控制教育部重点实验室,北京100081

出　　处：《探测与控制学报》2014年第5期74-79,共6页Journal of Detection & Control

基　　金：总装预研基金资助(9140A090307);北京理工大学科技创新计划资助(2010CX01003)

摘　　要：针对复杂电磁环境下卫星导航接收机抗干扰能力不足的问题,提出了低成本INS自适应辅助GNSS矢量跟踪方法。该方法根据观测量性能指示器、跟踪环路锁定情况和卫星信号信噪比等,自适应切换高动态标量跟踪环路和INS辅助矢量跟踪环路,实现低干扰环境下的高精度导航和中等干扰环境下满足导航精度情况下的最大导航能力。同时,给出了预处理滤波器、组合导航滤波器和高动态标量跟踪环路的具体设计方法。动态仿真试验结果表明,在高动态干扰环境下基于本算法的接收机可跟踪载噪比为15dB-Hz的GPS L1C/A卫星信号,比传统独立式高动态接收机的抗干扰能力提高了约12dB。In order to improve GNSS j amming immunity under the complex electromagnetic environment,an INS-aided GNSS adaptive vector tracking was proposed.According to the measurement performance indicator, tracking loop lock and satellite signal SNR,scalar tracking loops and vector tracking loops wwere switched a-daptively to meet the navigation accuracy under interference environments.And the design methods of pre-process filter,integrated navigation filter and high dynamic scalar tracking loop were presented.Dynamic simu-lation test showed that the ultra-tight coupling based on INS-aided vector loop could track carrier-to-noise 15dB-Hz GPS L1 C/A signal,and the J/S level was 12 dB bigger than stand-alone receiver.

关 键 词：干扰抑制 INS辅助矢量跟踪 高动态跟踪 INS/GNSS超紧耦合 预处理滤波器 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]