卫星强磁场干扰分析

INTERFERENCE ANALYSIS OF STRONG MAGNETIC FIELD OF SPACECRAFT

文章对IGSO/MEO卫星采用的400A·m^2的磁力矩器周围的磁场分布进行了计算分析,计算表明距400A·m^2磁力矩器头部10cm处,磁场达到6．9×10^(-3)T。同时对部组件在磁场较强的环境中可能受到的影响进行了理论分析,并利用螺线管产生的磁场对星用DC/DC模块进行了测试。测试表明,部件的磁性变化只与其所处磁场环境有关,而与时间无关。同时,变化的磁场会对部件的内阻产生一定的影响,引起输入电流的变化,该变化会对部件的寿命带来一定的影响。

This article analyzes the surrounding magnetic field of the 400 A·m^2 magnetic torque used by IGSO/MEO satellite.The analysis indicates that the magnetic field can reach 69 Gauss at the distance of 10 cm from the magnetic torque's head.Also analyzed is the possible impacts on the satellite' components caused by a strong magnetic field.We've used the magnetic field of the solenoid to test the DC/DC modules used on the satellites.The test shows that the components' magnetism changes have nothing to do with the time and they're only due to the magnetic circumstance of the components,the changing magnetic field can cause changes of the components' resistances and then affect the currents to change accordingly and these changes of the currents may affect the life of the components.