A5103022484- Geophysics and Sensor Technology
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Advanced MEMS and NEMS Technologies
- Pulsars and Gravitational Waves Research
- Structural Health Monitoring Techniques
- Seismic Waves and Analysis
- Ionosphere and magnetosphere dynamics
- Astronomical Observations and Instrumentation
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Solar and Space Plasma Dynamics
- Cancer-related molecular mechanisms research
- Experimental and Theoretical Physics Studies
- Scientific Research and Discoveries
- Advanced Computational Techniques and Applications
- Sensor Technology and Measurement Systems
- Climate variability and models
- Calibration and Measurement Techniques
- Marine and fisheries research
- Gamma-ray bursts and supernovae
- Quantum Electrodynamics and Casimir Effect
- Spacecraft and Cryogenic Technologies
- Scientific Measurement and Uncertainty Evaluation
- Space Technology and Applications
Huazhong University of Science and Technology
2016-2025
Shanghai Institute of Materia Medica
2013-2019
Chinese Academy of Sciences
2013-2019
Institute of Remote Sensing and Digital Earth
2015-2016
University of Chinese Academy of Sciences
2016
TianQin is a planned space-based gravitational wave (GW) observatory consisting of three earth orbiting satellites with an orbital radius about $10^5~{\rm km}$. The will form equilateral triangle constellation the plane which nearly perpendicular to ecliptic plane. aims detect GWs between $10^{-4}~{\rm Hz}$ and $1~{\rm that can be generated by wide variety important astrophysical cosmological sources, including inspiral Galactic ultra-compact binaries, stellar-mass black hole extreme mass...
The TianQin-1 satellite (TQ-1), which is the first technology demonstration for TianQin project, was launched on 20 December 2019. round of experiment had been carried out from 21 2019 until 1 April 2020. residual acceleration found to be about $1\times10^{-10}~{\rm m}/{\rm s}^{2}/{\rm Hz}^{1/2}$ at $0.1~{\rm Hz}\,$ and $5\times10^{-11}~{\rm $0.05~{\rm Hz}\,$, measured by an inertial sensor with a sensitivity $5\times10^{-12}~{\rm Hz}\,$. micro-Newton thrusters has demonstrated thrust...
High precision accelerometer plays an important role in space scientific and technical applications. A quartz-flexure operating low frequency range, having a resolution of better than 1 ng/Hz(1/2), has been designed based on advanced capacitive sensing electrostatic control technologies. high capacitance displacement transducer with 2 × 10(-6) pF/Hz(1/2) above 0.1 Hz, is used to measure the motion proof mass, mechanical stiffness spring oscillator compensated by adjusting voltage between...
Abstract Drag-free control (DFC) is one of the key technologies for space-borne gravitational wave detectors. For TianQin (TQ) project, non-gravitational disturbances on spacecraft must be suppressed by DFC. TianQin-1 (TQ-1) first satellite technology verification, whose main goal to verify reduction technologies. In this paper, DFC requirement and preliminary analysis TQ project are introduced, then design experimental validation with TQ-1 presented. In-orbit results show a successful...
In spaceborne gravitational-wave detectors, the stringent requirements on magnetic cleanliness of test masses (TMs) make development ground-based characterization techniques their properties important. An electrostatically controlled torsion pendulum has been built to measure TianQin-like solid TMs. The remanent magnetization ${m}_{r}$ and susceptibility $\ensuremath{\chi}$ TMs can be measured at level 1 nA ${\mathrm{m}}^{2}$ $8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$,...
The application of the folded pendulum (FP) as a tiltmeter is proposed and some features it have been studied both theoretically experimentally. First, FP could quite low resonance frequency due to its mechanical structure. period our prototype 6.2 s amplification factor about 100. Second, not sensitive environmental temperature variation but seriously affected by gradient. experiment with gradient modulation shows that static equilibrium position will change 2.5 μrad if difference between...
A simple high-voltage circuit with a voltage range of 0 to 900 V and an open-loop bandwidth 11 kHz is realized by using operational amplifier MOSFET combination. The used for the levitation test mass 71 g, suspended below top-electrodes gap distance 57 μm, so that performance electrostatic accelerometer can be tested on ground. translation noise accelerometer, limited seismic noise, about 4 × 10(-8) m/s(2)/Hz(1/2) at 0.1 Hz, while coupling one-order magnitude lower.
Al aser interferometer combined with a reference mirror suspended on long-period folded pendulum is presented to measure the low-frequency horizontal seismic spectrum. One of reflecting mirrors driven by piezoelectric transducer track another mirror. The experimental results show that motion about 10 −9 mH z −1/2 at 1 Hz in
The high precision space electrostatic accelerometer is an instrument to measure the non-gravitational forces acting on a spacecraft. It one of key payloads for satellite gravity measurements and fundamental physics experiments. measurement error directly affects field recovery earth. This paper analyzes sources bias according operating principle structural constitution accelerometer. Models due asymmetry displacement sensing system, including mechanical sensor head capacitance circuit,...
High-precision space inertial sensors are one of the most important payloads in satellite Earth's gravity measurement and space-based gravitational wave detection due to their extremely high sensitivity. However, seismic noise affects its terrestrial-based performance validation, so that it is very significant develop low frequency horizontal vibration isolation system suppress impact noise. In this article, a active bench for investigation accelerometer developed, on which motion three...
The performance test of precision space inertial sensors on the ground is inevitably affected by seismic noise. A traditional vibration isolation platform, generally with a resonance frequency several Hz, cannot satisfy requirements for testing an sensor at low frequencies. In this paper, we present pendulum bench based translation-tilt compensation. theoretical analysis indicates that noise effect located can be attenuated more than 40 dB below 0.1 which very significant investigating...
Ultra-sensitive inertial sensors are one of the key components in satellite Earth's gravity field recovery missions and space gravitational wave detection missions. Low-noise capacitive position transducers crucial to these achieve scientific goal. However, actual engineering applications, sensor head electronics unit usually place separately platform where a connecting cable is needed. In this paper, we focus on stray-capacitance influences coaxial cables which used connect mechanical core...
A high precision electrostatic accelerometer has widely been employed to measure gravity gradients and detect gravitational waves in space. The high-voltage levitation method is one of the solutions for testing accelerometers on ground, which aims at simultaneously detecting all six-degree-of-freedom movements engineering flight prototypes. However, noise performance test mainly limited by seismic noise. combined vibration isolation platform adopted improve detection method. In this paper, a...
An electrostatically controlled torsion pendulum has been constructed to investigate the performance of ASTROD I inertial sensor on ground. The twist motion is monitored by a capacitive transducer and an electrostatic actuator. preliminary experimental results show that torque resolution 2 × 10 -12 N m Hz -1/2 at 3 mHz. Further improvements under consideration for are discussed.
A low-frequency vibration insensitive accelerometer test pendulum bench based on translation-tilt compensation for testing a high precise has been proposed in order to suppress the effect of seismic noise. However, noise suppression could be affected by high-frequency coupling due possible nonlinearities and cross-coupling off-axis location accelerometers bench. In this paper, basic design actual application requirement, is firstly modeled analyzed, then adjustment schemes combined with...