一种航天器磁特征全息成像方法

为准确描述和评估航天器的磁特性，建立航天器网格化磁模型，提出航天器磁场信息成像方法。利用立体阵列扫描系统，对航天器测量面的磁场信息进行采集和计算，联合磁梯度张量的模量极值和欧拉反演法确定其内部磁源的水平位置和深度，实现航天器内部、探测面和空间磁信息的可视化分析和展示。航天器模型（格距10 cm）三点磁源试验和计算结果显示，该方法对内部磁源单方向定位偏差小于0.05 m，单方向磁矩偏差小于0.02 A?m2；空间磁场强度和磁矩误差均小于5%。该方法为快速获取类长方体形航天器的磁信息提供了一种新的工程实践手段。

A method for holographic imaging of spacecraft magnetic characteristics

To accurately evaluate the magnetic properties of spacecraft, a gridded magnetic model of spacecraft is established, and a method for the holographic imaging of the spacecraft’s 3-D magnetic field information is proposed. The magnetic field information of the spacecraft measuring surface is collected and calculated by using the stereo array scanning system, and the horizontal position and the depth of the internal magnetic sources are determined by an integrated consideration of the modulus extremum of the magnetic gradient tensor and the Euler inversion method, so that the magnetic information pertaining to the spacecraft interior, the detecting surface and the ambient space can be analyzed in a visual pattern. A test for the spacecraft model with a grid space of 10 cm is conducted for a single magnetic source and the multi-point sources. It is found that the deviation of the single direction location of the internal magnetic source is less than 0.05 m, while the deviation of the single direction magnetic moment is less than 0.02 A?m2; the gross errors of the space magnetic field intensity and the magnetic moment for the test article are less than 5%. This method provides a practical means for rapidly obtaining magnetic information of the quasi-rectangular spacecraft.