MICROSCOPE卫星及其无阻力姿态控制系统
MICROSCOPE Satellite and its Drag-Free and Attitude Control System
摘要：
本文着重介绍了MICROSCOPE卫星及其无阻力姿态控制系统（DFACS）的设计和性能。该卫星来自CNES的Myriade平台系列，尽管根据前所未有的显微镜任务要求进行了重大升级。这颗300公斤重的无阻力微型卫星已经完成了两年的飞行，性能高于预期。其被动热概念允许在测量频率$f_{\rm{EP}}$下的变化小于1 $μ$ K。推进系统提供了一个6轴连续和非常低的噪音推力从零到几百微牛顿。最后，其DFACS（旨在补偿施加在卫星上的干扰力和扭矩）的性能是在低地球轨道上有史以来最好的，在$f_{\rm{EP}}$的8天内，沿三个轴的剩余加速度低于$10^{-12} {\rm m/s}^2$。
英文摘要：
This paper focus on the description of the design and performance of the MICROSCOPE satellite and its Drag-Free and Attitude Control System (DFACS). The satellite is derived from CNES' Myriade platform family, albeit with significant upgrades dictated by the unprecedented MICROSCOPE's mission requirements. The 300kg drag-free microsatellite has completed its 2-year flight with higher-than-expected performances. Its passive thermal concept allowed for variations smaller than 1 $μ$K at the measurement frequency $f_{\rm{EP}}$. The propulsion system provided a 6 axis continuous and very low noise thrust from zero to some hundreds of micronewtons. Finally, the performance of its DFACS (aimed at compensating the disturbing forces and torques applied to the satellite) is the finest ever achieved in low Earth orbit, with residual accelerations along the three axes are lower than $10^{-12} {\rm m/s}^2$ at $f_{\rm{EP}}$ over 8 days.
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