A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum
The inertial sensor is the key measurement payload of the technology verification satellite of China’s space gravitational wave detection mission-Taiji Project, which uses capacitive sensors to sense the acceleration disturbance of the test mass under the influence of non-conservative forces in the...
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MDPI AG
2020-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/9/3090 |
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| author | Shaoxin Wang Liheng Chen Yukun Wang Zhenping Zhou Keqi Qi Zhi Wang |
| author_facet | Shaoxin Wang Liheng Chen Yukun Wang Zhenping Zhou Keqi Qi Zhi Wang |
| author_sort | Shaoxin Wang |
| collection | DOAJ |
| description | The inertial sensor is the key measurement payload of the technology verification satellite of China’s space gravitational wave detection mission-Taiji Project, which uses capacitive sensors to sense the acceleration disturbance of the test mass under the influence of non-conservative forces in the frequency range of 10 mHz~1 Hz. It is necessary to perform a ground performance evaluation and estimate the working state of the payload in orbit. However, due to the influence of the earth’s gravity and seismic noise, it is impossible to directly evaluate the resolution level of the non-sensitive axis when testing with high-voltage levitation, which leads to incomplete evaluation of the performance of the inertial sensor. In order to implement this part of the test, the sensitive structure is designed and a torsion pendulum facility for performance testing is developed. The experimental results show that the measurement resolution of the non-sensitive axis of the inertial sensor can reach 9.5 × 10<sup>−7</sup> m/s<sup>2</sup>/Hz<sup>1/2</sup> under the existing ground environmental conditions and is mainly influenced by the seismic noise during the system measurement. If the inertial sensor enters orbit, the measurement resolution can achieve 3.96 × 10<sup>−9</sup> m/s<sup>2</sup>/Hz<sup>1/2</sup>, which meets the requirements of the technology verification satellite for a non-sensitive axis. This proposed system also provides a reasonable method for the comprehensive evaluation of inertial sensors in the future. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T20:09:24Z |
| publishDate | 2020-04-01 |
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| spelling | doaj.art-541660b7b8fe4eb78e03de8c692bc5582023-11-19T22:59:47ZengMDPI AGApplied Sciences2076-34172020-04-01109309010.3390/app10093090A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion PendulumShaoxin Wang0Liheng Chen1Yukun Wang2Zhenping Zhou3Keqi Qi4Zhi Wang5Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130011, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130011, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130011, ChinaSchool of Mechanical and Aerospace Engineering, Jilin University, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130011, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130011, ChinaThe inertial sensor is the key measurement payload of the technology verification satellite of China’s space gravitational wave detection mission-Taiji Project, which uses capacitive sensors to sense the acceleration disturbance of the test mass under the influence of non-conservative forces in the frequency range of 10 mHz~1 Hz. It is necessary to perform a ground performance evaluation and estimate the working state of the payload in orbit. However, due to the influence of the earth’s gravity and seismic noise, it is impossible to directly evaluate the resolution level of the non-sensitive axis when testing with high-voltage levitation, which leads to incomplete evaluation of the performance of the inertial sensor. In order to implement this part of the test, the sensitive structure is designed and a torsion pendulum facility for performance testing is developed. The experimental results show that the measurement resolution of the non-sensitive axis of the inertial sensor can reach 9.5 × 10<sup>−7</sup> m/s<sup>2</sup>/Hz<sup>1/2</sup> under the existing ground environmental conditions and is mainly influenced by the seismic noise during the system measurement. If the inertial sensor enters orbit, the measurement resolution can achieve 3.96 × 10<sup>−9</sup> m/s<sup>2</sup>/Hz<sup>1/2</sup>, which meets the requirements of the technology verification satellite for a non-sensitive axis. This proposed system also provides a reasonable method for the comprehensive evaluation of inertial sensors in the future.https://www.mdpi.com/2076-3417/10/9/3090capacitive sensorinertial sensormeasurement resolutionnon-sensitive axissensitive structuretest mass |
| spellingShingle | Shaoxin Wang Liheng Chen Yukun Wang Zhenping Zhou Keqi Qi Zhi Wang A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum Applied Sciences capacitive sensor inertial sensor measurement resolution non-sensitive axis sensitive structure test mass |
| title | A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum |
| title_full | A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum |
| title_fullStr | A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum |
| title_full_unstemmed | A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum |
| title_short | A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum |
| title_sort | space inertial sensor ground evaluation system for non sensitive axis based on torsion pendulum |
| topic | capacitive sensor inertial sensor measurement resolution non-sensitive axis sensitive structure test mass |
| url | https://www.mdpi.com/2076-3417/10/9/3090 |
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