磁偶极子源的被动测距与跟踪

基于电磁波在海水中的传播方程，分析了海水中磁偶极子辐射场的分布特性，建立了运动磁遇极子的测量坐示系并推导出被动测距方程，提出了基于磁偶极子源的三维被动测距方法及非线性最小二乘被动跟踪算法，通过对最小二乘算法的分析比较，利用离散型Levenberg-Marquardt算法对所建立的三维被动测距数学模型进行了仿真计算。结果表明，在水下有效测距离范围内，利用磁有子辐源进行被动测距与跟踪的方法是有效的，具有较高的测距精度。

Passive Ranging and Tracking Method for Magnetic Dipole Source

The distribution characteristic of the magnetic dipole field is analyzed based on the propagation equations of underwater electromagnet ic wave. The ranging coordinate is established and passive ranging equations are derived on the moving magnetic dipole. The method of 3-D passive ranging and t he nonlinear least-square passive location and tracking algorithm is proposed based on the characte- ristics of the magnetic dipole source. Applying the d iscret e Levenberg-Marquardt algorithm, the calculation and the simulation of 3-D pas sive ranging model are carried out by evaluating and comparing the least- square algorithm. The results of simulational experiment show that the method of passi ve ranging and tracking is effective and fairly precise by the magnetic dipole sour ce within the undersea functional range.