摘要
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.
An online soft-fault detecting method for GPS based on modulated Gaussian wavelet transform（MGWT）is presented which can perform online soft-fault detection such as BeeLine GPS losing lock, dispersion singularity, etc. At last, a practical system with a magnetic compass HMR3000 and a BeeLine GPS is tested on the vehicle by the method. Experiment results show that the heading reliability of the system is improved from 72% to 100% and that the system error decreases to 60% of the original error. The key problem in the magnetic compass/GPS system is effectively solved with the method of MGWT.
出处
《测试技术学报》
2006年第2期138-143,共6页
Journal of Test and Measurement Technology
基金
国家自然科学基金资助项目(40125013)
关键词
GPS
磁罗经
组合导航系统
调频高斯小波变换
容错算法
GPS
magnetic compass
integrated navigation system
modulated Gaussian wavelet transformation
fault tolerance algorithm
