提出了一种基于调频高斯小波变换的GPS软故障诊断算法.该算法可以对GPS失锁、方差奇异等软故障进行在线检测.以HM R 3000磁罗经和B eeL ine GPS实际系统跑车试验数据显示,利用调频高斯小波变换方法后,系统航向可用性从原来的72%提高到了100%;系统的误差减小到原来的60%.因此,调频高斯小波变换方法有效地解决了磁罗经/GPS中在线软故障检测的难题.
To mitigate the ill effects and obtain more accurate and stable solution of the observation equations, the so-called truncated singular-value decomposition (TSVD) method is introduced by modifying the small (nonzero) singular values of the coefficients matrix. The proposed method directly disposed the ill-conditioning observation equations, which differs considerably from the traditional normal equation method. An application explains that TSVD can mitigate the ill conditioning.
GUI Qing-ming~1, GUO Jian-feng~(1, 2) (1. Institute of Science, Information Engineering University, Zhengzhou 450001, China