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测绘学报  2015 

GPS/INS紧组合的INS辅助周跳探测与修复

DOI: 10.11947/j.AGCS.2015.20140350, PP. 848-857

Keywords: 惯性辅助,周跳,探测与修复,GPS/INS,紧组合

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Abstract:

建立了GPS/INS紧组合定位模型,改正惯性器件误差及电离层折射误差,对不同组合观测量的误差影响进行了分析,构造不同观测值组合,提出了基于惯性信息辅助的GPS周跳自适应探测方法,分析了INS定位误差对周跳探测的影响,给出了周跳探测误报率及修复成功率评价指标,提出了一种周跳检测阈值自适应确定方法。利用实测组合导航试验数据验证本文的算法,文中模拟了不同的单历元多周跳及信号失锁条件,结果表明,在GPS信号完全失锁20s内,该方法能准确检测和修复所有周跳,中断时间的延长降低了周跳修复的成功率;GPS信号部分失锁时,在模拟的90s中断时段内仍能修复所有周跳;模拟了170历元的5s间隔密集周跳,周跳探测成功率为100%,正确修复率为99.41%。

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