摘要
为了缩短飞行器外部磁场干扰的学习补偿时间,提出了飞行器外部磁场补偿的预处理方法,以简化飞行器在空中的学习补偿过程。该方法利用飞行器外部磁场的特点,将恒定磁场、感应磁场和涡流磁场分离成两部分。先在地面通过测量分别计算出外部磁场干扰的磁场系数,在空中直接用求得的系数进行磁场补偿,再通过自适应滤波滤除剩余干扰。实验表明:该方法大大缩短了空中学习补偿时间,简化了学习过程,经过补偿能检测出1 nT的磁异常信号。
The pretreatment of the compensation for aircraft′s magnetic interference was proposed to simplify the traditional aircraft′s compensation and reduce time in studying it.According to the magnetic characteristics of aircraft,the method separated the permanent inference,induced inference and eddy inference.Instead of calculating an 18 terms of linear morbid equation in the air,the coefficients of magnetic interference were calculated on the ground and then directly used to remove the magnetic interference in the air.The remained interference was filtered by adaptive filtering.The experimental results show that the smallest magnetic anomaly signal that the aircraft ear detect is 1 nT by using this method.
出处
《海军工程大学学报》
CAS
北大核心
2011年第3期58-61,66,共5页
Journal of Naval University of Engineering
基金
国家部委基金资助项目(51444060101JB1108)
关键词
磁场
航空磁探
自适应滤波
微弱信号检测
magnetic field
aeromagnetic survey
adaptive filtering
detecting weak signal
