地磁匹配定位中高精度地磁测量组合降噪算法
Combined Noise Reduction Algorithm for High Precision Geomagnetic Measurement in Geomagnetic Matching Location
张玉芝 1杨腾越 2杨云涛 1孙荟 1刘刊1
作者信息
- 1. 河北工业职业技术大学汽车工程系,河北 石家庄 050091
- 2. 陆军航空兵学院一大队,北京 101123;陆军工程大学十二大队,江苏 南京 210007
- 折叠
摘要
针对地磁匹配定位中,地磁测量信号包含导航载体软硬磁材料磁场、电气设备磁场、动力传动设备磁场等多种磁扰噪声问题,从理论上分析了软硬磁材料、电气设备、动力传动设备产生磁场的特性,推理了固定参数补偿软硬磁材料磁场补偿模型,分析了小波降噪的原理及可行性,首次提出了采用固定参数-小波滤波组合降噪算法消除磁扰误差,从理论上剖析了该算法的优越性及可行性,并利用多组实验数据进行了实验.通过实验及误差分析证明,该算法具有很好的降噪效果,有效解决了地磁测量磁扰噪声的关键问题,误差均方差均小于 10 nT,达到了提升地磁测量精度的目的.
Abstract
In geomagnetic matching and positioning,geomagnetic measurement signals contain a variety of magnetic disturbance noise such as magnetic field of soft and hard magnetic materials of navigation carrier,magnetic field of electrical equipment,magnetic field of power transmission equipment,etc.The characteristics of magnetic field generated by soft and hard magnetic materials,electrical equipment and power transmission equipment are theoretically analyzed,and the magnetic field compensation model of soft and hard magnetic materials with fixed parameters is deduced.The principle and feasibility of wavelet denoising are analyzed,and the magnetic disturbance error is eliminated by using the fixed parameter and wavelet filter combined denoising algorithm.The experiment and error analysis show that the algorithm has a good noise reduction effect,and effectively solves the key problem of magnetic disturbance noise in geomagnetic measure-ment.The mean square error is less than 10 nT,and the purpose of improving the geomagnetic measurement accuracy is achieved.
关键词
地磁测量/小波降噪/参数补偿/组合降噪Key words
geomagnetic measurement/wavelet noise reduction/parameter compensation/combined noise reduction引用本文复制引用
基金项目
国防重点预研项目(51309060301)
石家庄市智能网联汽车导航定位技术创新中心项目()
出版年
2024
国家科技期刊平台
NSTL
万方数据