近场分析法在航天器磁测试中的误差因素及精度评估

航天器磁性测量误差因素及精度评估与航天器结构尺寸、磁矩量级、内部磁性分布特征，以及所用的磁测试方法和测试设备等有密切关系。近场分析法是航天器磁偶极矩测定中经典有效的测试方法。文章就该法在航天器磁测试中的系统误差、随机误差因素及精度评估逐一进行详细论述和深入剖析；针对中大尺度航天器正置态磁测试中垂向磁矩测试结果存在的误差，提出提高测试精度和改进误差评估的有效方法和措施；给出航天器磁测试有效性综合评估的基本条件和评判标准，得到不同尺度航天器磁测试误差的预估参考范围。文章所述航天器磁测试误差因素及精度评估技术对于提高航天器磁测试精度、有效控制航天器磁性具有指导意义。

Error factors and accuracy assessment in magnetic test for spacecraft by near-field analysis method

The error factors and the accuracy evaluation in a magnetic test are closely related to the magnetic testing method, the structure size and the magnetic moment’s magnitude, the internal characteristics of the magnetic distribution in the spacecraft, and the magnetic testing equipment. The near-field analysis is the most classical and effective testing method for determining the magnetic dipole moment of the spacecraft. This paper discusses the system error, the random error factors, and analyzes the accuracy evaluation. To determine the testing errors for the vertical magnetic moment results for medium & large -scale spacecraft, some effective methods & measures are proposed to improve the testing accuracy and the error assessment. Finally, the basic conditions and the evaluation criteria are presented for the comprehensive evaluation of the effectiveness in the magnetic testing process for spacecraft. The estimated range of the magnetic testing errors is obtained for different sizes of spacecraft. The related techniques for the error analysis and the accuracy evaluation in the spacecraft’s magnetic testing process are desirable to improve the precision of the spacecraft magnetic test, and to control the spacecraft magnetism effectively.