光纤陀螺测量卫星结构角振动的地面试验验证

FOG Measures Satellite Structure Angle Vibration Method

针对结构角振动对卫星光学载荷成像影响大,且在轨微振动实时测量较困难的问题,文章对比了国内外角振动测量方法,提出利用光纤陀螺实时测量角振动方法,利用角振动激励台对光纤陀螺测量结果进行了标定,其测量精度满足要求,并测量了动量轮组合工作模式下的卫星载荷安装板的角振动特性。地面试验结果表明:此测量方法合理可行,可为增强卫星在轨的抗振性、提高有效载荷指向精度和稳定度提供参考。

In view of the problem that optical payload’s image quality is heavily influenced by angular vibration of structure and the vibration is hard to be real-time measured on-orbit,this paper contrast some domestic and international methods for angular vibration measurement,and proposes a real-time measure method for angular vibration by using FOG.The measurement result of FOG is calibrated by angular vibration excitation-table,and the results show that its measurement accuracy satisfies the requirement.Angular vibration characteristics of the satellite payload mounting surface are also measured in a momentum wheel combinational working mode.The result of ground tests show that the measure method is reasonable and it can provide a reference for enhancing satellite on-orbit anti-vibration and advancing payload pointing accuracy and stability.