磁梯度张量的旋转计算方法

为了获得磁梯度张量数据，提出旋转计算磁梯度张量的方法。使倾斜放置的磁梯度计绕竖直轴线转动，利用测得的空间磁梯度数据计算得到磁梯度张量。以磁梯度张量的理论值作为参考，选取一组较优的转动角、倾角和基线长度等模型参数，分析磁力仪三轴指向误差对磁梯度张量计算结果的影响。数值仿真结果表明：该旋转合成方法能够有效获取磁张量信息，合成计算值与理论值之间的差别较小。
In order to obtain the magnetic gradient tensor of magnetic target, the method of rotating-calculating magnetic gradient tensor was proposed. The enough magnetic gradient data can be measured by rotating the magnetic gradiometer about the vertical axis, and it is used to calculate the magnetic gradient tensor. The difference of the magnetic gradient tensor between theoretical value and measurement value was used as the reference, and the rotation angle, inclination angle and baseline length of calculation model were optimized. The influence of three-axis pointing error of magnetometer on the calculation result of magnetic tensor was analyzed. The simulation results show that the proposed method is effective in calculating the magnetic gradient tensor. There is little difference between the calculated value and the theoretical value.