Seismic noise is one of the main limits of performance validation experiments for space inertial sensor on the ground. A two-stage electrostatically controlled torsion pendulum was developed and used to investigate the performances of space inertial sensor for TianQin. To further suppress the seismic noise effect, a novel scheme that introduces another pendulum to suspend the electrode housing (EH) simultaneously is proposed. By choosing proper suspension for the EH with respect to the original pendulum for the test mass (TM), the relative motion between the TM and the EH is insensitive to seismic noise due to common mode rejection, and the disturbance on the inertial sensor caused by seismic noise can be suppressed about five orders of magnitude theoretically. Both theoretical analysis and experimental results show that the scheme can further suppress the seismic noise effect more than one order of magnitude.

中文翻译：

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单摆悬置电极壳改善空间惯性传感器地基研究的地震噪声效应抑制

地震噪声是地面空间惯性传感器性能验证实验的主要限制之一。开发了一种两级静电控制扭摆，用于研究天琴号空间惯性传感器的性能。为了进一步抑制地震噪声的影响，提出了一种新的方案，即引入另一个摆来同时悬挂电极外壳（EH）。通过为测试质量 (TM) 的原始摆锤选择合适的 EH 悬架，TM 和 EH 之间的相对运动由于共模抑制而对地震噪声不敏感，并且惯性传感器上的干扰由理论上可以抑制地震噪声约五个数量级。