导航载体涡流磁场特性仿真研究  

Study on Eddy Current Magnetic Field of Navigation Vehicle Based on Finite Element Method

作　　者：李季[1] 陈棣湘[1] 潘孟春[1] 罗飞路[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《计算机仿真》2013年第4期266-269,325,共5页Computer Simulation

基　　金：国家自然科学基金资助(51175507)

摘　　要：研究在地磁导航技术问题,包括涡流磁场在内的各种载体磁场的干扰一直是制约导航精度的难点问题。涡流磁场的特性复杂,针对传统的工程估算方法计算复杂、精度低的问题,为解决上述问题,以某水下载体为研究对象,首先建立起涡流磁场分析的数学模型,然后在Maxwell下进行三维瞬态仿真,得到其涡流磁场的分布,并从载体运动速度、加速度、外加磁场的强弱对涡流磁场的大小以及方向的影响等方面进行了研究。结果表明涡流磁场在载体中部较大,且大小与加速度成正比,与速度无关,方向则与载体运动速度的方向有关。所得结果对于涡流磁场的补偿以及传感器的配置具有重要的指导意义。In geomagnetic navigation, the interference of all kinds of vehicle magnetic fields on the magnetometer is one of the difficulties that restricting its application. Eddy current magnetic field is one of the vehicle magnetic fields and it is complex and hard to be compensated. The traditional engineering evaluation method is complex and has low precision. To solve this problem, this paper studied a certain vehicle by building up its mathematical model for eddy current magnetic field analysis firstly and made three - dimensional transient simulation with Maxwell. The influences of the vehicle velocity and acceleration and the magnitude of the geomagnetic field on the magnitude and direction of vehicle eddy current magnetic field were studied. The results show that the eddy current magnetic field gains its maximum value at the center of the vehicle, its magnitude is in direct proportion to the vehicle acceleration but has no relation with the velocity, and the direction of eddy current magnetic field is relative to the direction of the vehicle velocity. The results are very useful for the compensation of the eddy current magnetic field and the configura- tion of the magnetometer.

关 键 词：地磁导航 载体 涡流磁场 有限元 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]