A Space Inertial Sensor Ground Evaluation System for Non-Sensitive Axis Based on Torsion Pendulum
Open Access
- 29 April 2020
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 10 (9), 3090
- https://doi.org/10.3390/app10093090
Abstract
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 × 10−7 m/s2/Hz1/2 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 × 10−9 m/s2/Hz1/2, 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.This publication has 34 references indexed in Scilit:
- Seismic noise limit for ground-based performance measurements of an inertial sensor using a torsion balanceClassical and Quantum Gravity, 2010
- A new torsion pendulum for testing the limits of free-fall for LISA test massesClassical and Quantum Gravity, 2009
- Electrostatic-control performance measurement of the inertial sensor with a torsion pendulumJournal of Physics: Conference Series, 2009
- Ground based 2DoF test for LISA and LISA PFJournal of Physics: Conference Series, 2006
- INERTIAL SENSOR CONCEPT FOR THE GRAVITY WAVE MISSIONSActa Astronautica, 2001
- On-ground investigation of space accelerometers noise with an electrostatic torsion pendulumReview of Scientific Instruments, 2000
- The Gravity Probe B Relativity MissionAdvances in Space Research, 2000
- LISA mission overviewAdvances in Space Research, 2000
- Capacitive detection scheme for space accelerometers applicationsSensors and Actuators A: Physical, 1999
- Exospheric density measurements from the drag-free satellite TriadJournal of Geophysical Research, 1976