飞机对水下目标探测干扰磁场模型化补偿算法

Compensation Algorithm of Aircraft Magnetic Interference Modeling for Underwater Target Detection

针对高精度航空磁探的需求,考虑地磁总强度的变化引起的涡流场,改进基于Tolles-Lawson方程的飞机磁场模型,研究了利用磁场三分量获取方向余弦的误差控制,基于偏最小二乘回归算法求解模型参数,对飞机背景干扰磁场进行模型化补偿;对补偿算法进行了数据仿真,结果表明:模型化补偿算法有效的衰减飞机本身的磁场干扰,保留瞬态的微弱磁场信号,显著提高了对远场弱磁信号的探测能力。

The aircraft magnetic model based on Tolles-Lawson equation was improved considering the eddy field variation provoked by variation of total intensity of geomagnetic field to meet high accuracy aviation magnetic detection,and the error control method of direction cosine acquirement utilizing three-component magnetic field was studied. The model parameters were solved based on partial least square algorithm thus the aircraft inference magnetic model was compensated. Simulation results indicate that the magnetic inference induced by aircraft is effectively alleviated,the weak instant magnetic signal is preserved,and the remote weak magnetic field signal detection ability is greatly improved.