Seismic noise effect reduction improvement for ground-based investigation of space inertial sensor by suspending the electrode housing with an individual pendulum

Tan, Ding-Yin; Liu, Li; Hu, Ming; Zhou, Zebing

doi:10.1088/1361-6382/ac5a12

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…Experimental results validated that this pendulum can suppress the seismic noise by about 60 dB at 0.01 Hz [42]. Building upon this, we further introduced a two-stage torsion pendulum scheme with suspending EH, the test level was improved by nearly one order of magnitude by precisely selecting lengths of suspension fibers [43]. These ground test experiments enable the TM to be isolated from the ground, allowing for a lower response to the local seismic noise.…”

Section: Introductionmentioning

confidence: 82%

Seismic noise effect suppression for the performance testing of high-precision space electrostatic accelerometers using a torsion pendulum with differential configuration

Li,

Liu,

et al. 2024

Meas. Sci. Technol.

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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/s2/Hz1/2 at 10 mHz, which is limited by the intrinsic noises of accelerometers used here.

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Section: Introductionmentioning

confidence: 82%

Seismic noise effect suppression for the performance testing of high-precision space electrostatic accelerometers using a torsion pendulum with differential configuration

Li,

Liu,

et al. 2024

Meas. Sci. Technol.

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A 50 pico-g resolution integrated test facility for high-precision inertial sensors

Mei,

Ma,

Bai

et al. 2023

Meas. Sci. Technol.

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High-precision inertial sensors are the key instruments for many applications. However, their performance is difficult to test on the ground due to the effect of seismic noise. To evaluate the complete performance of inertial sensors, the main test items include noise floor test, scale factor calibration, resolution test and so on. The accelerometers used in inertial navigation and precision measurement fields usually require direct resolution test. Depending on the application, the resolution of high-precision accelerometers can reach up to the pico-g (pg) level or even higher. However, the resolution test ability of conventional test systems is limited by the seismic noise and the precision of the input signal, which becomes the main obstacle for the development of sub-nano-g to pg level accelerometers. In this paper, a simultaneous two-dimensional integrated performance test facility is developed using an active vibration isolation bench and precision gravitational input, allowing the performance test of high-precision inertial sensors and direct evaluation of resolution at the 50 pg level.

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Coupling effect of vibrations and residual electrostatic force in short-range gravitational experiments

Dong,

Tan,

et al. 2023

Phys. Rev. Applied

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Seismic noise effect reduction improvement for ground-based investigation of space inertial sensor by suspending the electrode housing with an individual pendulum

Cited by 4 publications

References 24 publications

Seismic noise effect suppression for the performance testing of high-precision space electrostatic accelerometers using a torsion pendulum with differential configuration

Seismic noise effect suppression for the performance testing of high-precision space electrostatic accelerometers using a torsion pendulum with differential configuration

A 50 pico-g resolution integrated test facility for high-precision inertial sensors

Coupling effect of vibrations and residual electrostatic force in short-range gravitational experiments

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