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

作　　者：张玉芝 杨腾越 杨云涛 孙荟 刘刊 ZHANG Yuzhi;YANG Tengyue;YANG Yuntao;SUN Hui;LIU Kan(Department of Automotive Engineering,Hebei Vocational University of Industry and Technology,Shijiazhuang Hebei 050091,China;Army Aviation College 1st team,Beijing 101123,China;Army Engineering University 12th team,Nanjing Jiangsu 210007,China)

机构地区：[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 [3]陆军工程大学十二大队,江苏南京210007

出　　处：《传感技术学报》2024年第6期1041-1048,共8页Chinese Journal of Sensors and Actuators

基　　金：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。

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。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 

分 类 号：U666.1[交通运输工程—船舶及航道工程]