摘要
地磁导航中的测量误差是影响地磁导航精度的关键因素,而包括涡流磁场在内的载体干扰磁场是产生误差的主要因素。目前各种运载体大量使用铁磁性材料,这样不可避免地会引起涡流磁场等干扰磁场。因此文中采用COMSOL Multiphysics仿真软件,建立了高速运动载体的涡流干扰场仿真模型。首先研究了永磁体与匀强磁场之间的关系,发现永磁体的剩磁越强,匀强场也越强,为模拟地磁场提供了理论依据。其次分析了载体在匀速转动时涡流磁场对地磁测量的影响,最后研究了载体摆动时的涡流场的分布。结果表明涡流磁场随着速度的增大而增强,且涡流磁场主要分布于载体中间位置。仿真结果为下一步地磁导航中的误差建模以及磁场校正技术的研究提供了理论依据。
The measurement error in geomagnetic navigation is a key factor of affecting the accuracy of geomagnetic navigation,and the carrier interferential magnetic field,including eddy current magnetic field,is the main factor of error.At present,a large number of carriers made of ferromagnetic materials inevitably cause eddy magnetic fields and other interferential magnetic fields.Therefore,this paper establishes a simulation model of eddy interferential magnetic field of high-speed moving carrier by adopting COMSOL Multiphysics simulation software.First,the relationship between permanent magnet and uniform magnetic field is studied.It turned out to be that the stronger the remains of permanent magnet,the stronger the uniform magnetic field,which provides a theoretical basis for simulating the geomagnetic field.Secondly,the influence of eddy current magnetic field on geomagnetic measurement is analyzed when the carrier rotates at constant speed.Finally,the distribution of eddy current field is studied when the carrier swings.The results show that the eddy current magnetic field increases with the increase of velocity,and the eddy current magnetic field is mainly located in the middle of the carrier.The simulation results provide a theo-retical basis for the error modeling and the magnetic field correction technology in the future geomagnetic navigation.
作者
李驰
杨宾峰
樊博宇
胥俊敏
孙欢
LI Chi;YANG Binfeng;FAN Boyu;XU Junmin;SUN Huan(Information and Navigation College,Air Force Engineering University,Xi＇an 710077,China;Science and technology on Electronic Information Control Laboratory,Chengdu 610036,China)
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2018年第4期72-78,共7页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金(51577191)
电子信息控制重点实验室基金
关键词
地磁导航
运载体
高速运动
涡流磁场
geomagnetic navigation
carriers
high speed motion
eddy magnetic field
