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针对地磁环境下外干扰磁场影响卫星磁试验精度问题,综合分析外干扰源场和卫星近场特性;通过合理布局(包括位置和方式)外干扰磁场监测传感器和卫星磁场采集传感器,增设动态磁场采集的A/D取样扫描频率循环控制、信号统计、滤波、数据拟合等信号处理功能,解决了监测传感器和采集传感器所得到的干扰信号的同步性、等效性、一致性,以及采集传感器信号中卫星真实磁场与干扰磁场之间的不相干性;实现了卫星磁试验的外干扰磁场有效闭环控制、自动跟踪、补偿和修正。通过24 h实时监测,外干扰磁场波动控制在0.5~1.0 n T范围内,获得地磁环境下卫星24 h“准零磁”环境磁试验条件,满足卫星磁试验对磁环境的技术要求。
Aiming at the problem that the magnetic field affects the accuracy of the satellite magnetic test under the magnetic environment of geomagnetic environment, the external interference source field and the near-field characteristics of the satellite are analyzed comprehensively. The magnetic field sensor and the satellite magnetic field acquisition sensor are externally arranged through the reasonable layout (including the location and the mode) A / D sampling and scanning frequency loop control, signal statistics, filtering, data fitting and other signal processing functions to solve the monitoring sensor and the acquisition of the interference signals obtained by the sensor synchronization, equivalence, consistency, and the acquisition sensor signal In the satellite real magnetic field and interference magnetic field between the incoherence; satellite magnetic test to achieve an effective external magnetic field closed-loop control, automatic tracking, compensation and correction. Through the 24 h real-time monitoring, the fluctuation of the external disturbance magnetic field is controlled within the range of 0.5-1.0 nT, and the magnetic test conditions for 24 h “quasi-zero magnetic” environment of the satellite in geomagnetic environment are obtained, which meets the technical requirements for magnetic environment of the satellite magnetic test.