磁柱面作图法获取航天器垂向有效磁矩的探究

A method for acquiring vertical effective magnetic moment of spacecraft by magnetic cylinder mapping

  • 摘要: 为解决大尺度、大磁矩航天器磁性测量时采用常规近场测试方法带来的整器磁矩偏心误差大、无法获得有效磁矩的难题,采用在航天器几何赤道面上下典型区域多层次布局传感器的方式获得整器柱面静态磁场数据。按10꞉1器模比例建立航天器垂向标准磁偶极子、双磁偶极子和组合态多磁偶极子磁矩分布模型,按上述多层分布测试方法对标准模型进行仿真试验。结果表明:在异向双磁偶极子和多磁偶极子模型中,当传感器位置高度逼近模型垂向磁赤道区域时,获得的结果更接近模型预置的标准磁矩量值;整器垂向磁性分布特征与异向多极子模型2具有高度相似性,进一步证明航天器磁赤道区域测得的结果更真实代表了垂向磁矩量值。该方法极大地提高了大磁矩航天器整器垂向磁矩准确性及其裕度控制范围。

     

    Abstract: In view of the large eccentricity error and inability to obtain effective magnetic moment by the conventional near-field method for magnetic measurement of spacecraft with large scale and large magnetic moment, a multi-layer arrangement of sensors in typical areas above and below the geometric equatorial plane of spacecraft was used to obtain the cylindrical static magnetic field data. The vertical standard magnetic dipole, double magnetic dipole, and combined multipole magnetic moment distribution models for spacecraft were established on a scale of 10꞉1, and the simulation testing based on the standard models was conducted by the above multi-layer sensor arrangement method. The results show that, in the anisotropic dipole and the combined multipole models, when the sensor's position height approached the vertical magnetic equatorial region of the model, the obtained results were closer to the preset standard magnetic moment value. The vertical magnetic distribution characteristics of the whole spacecraft were highly similar to the anisotropic multipole model II, which further proved that the results measured in the magnetic equator region more truly represent the vertical magnetic moment value of the spacecraft. This method helps effectively to improve the vertical magnetic moment test accuracy and margin control range of large spacecraft with large magnetic moment.

     

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