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利用摆锤对天琴试验质量块双侧释放机构进行地面测试。

On-Ground Testing of Dual-Sided Release Mechanism of TianQin Test Mass Using a Pendulum.

作者信息

Wang Ji, Shi Diwen, Xue Chao, Yang Biao, Cai Bingwei, Chang Jie, Zhou Zefan, Tan Wenhai, Yang Shanqing

机构信息

MOE Key Laboratory of TianQin Mission, TianQin Research Center for Gravitational Physics & School of Physics and Astronomy, Frontiers Science Center for TianQin, Gravitational Wave Research Center of CNSA, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, China.

出版信息

Sensors (Basel). 2025 May 2;25(9):2878. doi: 10.3390/s25092878.

DOI:10.3390/s25092878
PMID:40363314
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12074341/
Abstract

The high-precision gravitational reference sensor, which hosts a heavy test mass (TM) surrounded by electrodes with a relatively large gap, is crucial in all high-sensitivity drag-free sensors. Consequently, a dedicated locking mechanism is needed to securely hold the TM during the launch phase. After reaching the intended orbit, the TM is released to a free-falling state and subsequently captured by electrostatic actuation, which demands that the transferred momentum and angular momentum to the TM do not exceed 10-5kgm/s and 10-7kgm2/s, respectively. This paper introduces a three-level structural design of the locking-and-release mechanism. In order to investigate the release requirement, a pendulum system has been developed for on-ground testing. The mock-up of the TM is entirely consistent with the size and mass of TianQin TM, and the dual-sided release tips constrain the TM and then rapidly retract simultaneously, after which the transferred momentum and angular momentum are estimated from the free oscillations as 0.38(21)×10-5kgm/s and 0.15(14)×10-7kgm2/s with a preload force of 0.3 N. This proposes a feasible scheme for validating the release mechanism conducting impulse testing for the TianQin project.

摘要

高精度引力参考传感器在所有高灵敏度无拖曳传感器中都至关重要，该传感器有一个被电极环绕且间隙相对较大的重测试质量块（TM）。因此，需要一种专用锁定机构在发射阶段牢固地固定测试质量块。到达预定轨道后，测试质量块被释放到自由落体状态，随后通过静电驱动捕获，这要求传递给测试质量块的动量和角动量分别不超过10^-5kg·m/s和10^-7kg·m²/s。本文介绍了一种锁定与释放机构的三级结构设计。为了研究释放要求，开发了一个摆锤系统用于地面测试。测试质量块的模型在尺寸和质量上与天琴计划的测试质量块完全一致，双侧释放尖端约束测试质量块，然后同时快速缩回，之后根据自由振荡估计传递的动量和角动量分别为0.38(21)×10^-5kg·m/s和0.15(14)×10^-7kg·m²/s，预加载力为0.3N。这为天琴计划验证释放机构进行脉冲测试提出了一个可行方案。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/b4510a91c1e1/sensors-25-02878-g015.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/88f52dcc6d6a/sensors-25-02878-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/d405d787d2ae/sensors-25-02878-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/7423858336ab/sensors-25-02878-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/25005615d08c/sensors-25-02878-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/1355359f910e/sensors-25-02878-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/261075102520/sensors-25-02878-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/6d51e3a0efc2/sensors-25-02878-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9f5f/12074341/b4510a91c1e1/sensors-25-02878-g015.jpg

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本文引用的文献

1
Ground testing of release impulse for the aluminum cubic test mass with a compound pendulum for the TianQin project.利用复摆对天琴计划的铝质立方体测试质量块进行释放脉冲的地面测试。
Rev Sci Instrum. 2023 Sep 1;94(9). doi: 10.1063/5.0168739.
2
Sub-Femto-g Free Fall for Space-Based Gravitational Wave Observatories: LISA Pathfinder Results.用于天基引力波天文台的亚飞克（sub-femto-g）自由落体：丽莎探路者号的结果。
Phys Rev Lett. 2016 Jun 10;116(23):231101. doi: 10.1103/PhysRevLett.116.231101. Epub 2016 Jun 7.
3
Measurement of momentum transfer due to adhesive forces: on-ground testing of in-space body injection into geodesic motion.
由于粘附力导致的动量传递测量：在地面上对太空物体注入测地线运动的测试。
Rev Sci Instrum. 2011 Dec;82(12):125107. doi: 10.1063/1.3658479.
4
Gravity Probe B: final results of a space experiment to test general relativity.引力探针 B：一项测试广义相对论的空间实验的最终结果。
Phys Rev Lett. 2011 Jun 3;106(22):221101. doi: 10.1103/PhysRevLett.106.221101. Epub 2011 May 31.