基于磁场梯度的船舶磁场模型

Vessel magnetic field model based on magnetic gradient

推导了磁旋转椭球体阵列在三维空间中磁场梯度的公式,建立了基于磁场梯度的椭球体阵列的磁场模型。针对模型的精度和稳定性易受人为选择椭球体参数影响的弊端,利用逐步回归方法来确定船舶磁场模型的各参数。船模试验表明,该模型精度高,可以广泛用作磁性目标的近距离定位和磁场建模。

This thesis analyses magnetic field gradient distribution of magnetic ellipsoid array in three-dimensional space, and constitutes field gradient model for array. Pointing to the flaw that the model accuracy and stability is influenced by the artificial preferences very much,it applies the stepwise regression techniques to define parameters of magnetic model. The result of vessel model-experiments shows that the model has high precision. The model can be used magnetic location and modeling of magnetic objects in close range.