扭摆钟
加速度计
扭转(腹足类)
钟摆
声学
物理
噪音(视频)
控制理论(社会学)
机械
计算机科学
医学
外科
控制(管理)
量子力学
人工智能
图像(数学)
作者
J. Li,Zhou Liu,Yong Ma,Jianbo Yu,Li Liu,Zebing Zhou
标识
DOI:10.1088/1361-6501/ad688c
摘要
Abstract To test the performance of high-precision electrostatic accelerometers for next generation satellite gravity measurement missions, a torsion pendulum integrated with two electrostatic accelerometers is proposed. In this differential configuration scheme, the seismic noise effect can be further suppressed due to common-mode rejection. Theoretical analysis shows that the seismic noise effect rejection ratio is determined by the inconsistency factors of two accelerometers, and after the compensation for inconsistency, the seismic noise effect can be suppressed by at least 85 dB below 0.1 Hz. Preliminary experimental results are agreed with the theoretical analysis, and its detection sensitivity comes to 2 × 10 − 11 m s −2 Hz − 1 / 2 at 10 mHz, which is limited by the intrinsic noises of accelerometers used here.
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