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| Micro-vibration Testing Technology of Space Station Control Moment Gyroscope |
| Received:June 07, 2018 Revised:August 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.08.018 |
| KeyWord:space station control moment gyroscope micro-vibration testing six-component testing, vibration isolation stiffness analysis |
| Author | Institution |
| WU Yao |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| XIE Yi-cun |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| YAN Ting-fei |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| FANG Gui-qian |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| JIAO An-chao |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
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| Abstract: |
| Objective To analyze the micro-vibration perturbation characteristics of control moment gyroscope. Methods The micro-vibration perturbation characteristics of the CMG were obtained by measuring the force signal at the contact surface and the acceleration signal at the crucial location. The external environment was isolated by means of vibration isolation to reduce the background noise of the test. A high precision test sensor was used to measure micro-vibration force signal and acceleration signal. The stiffness of the system was identified with the structural finite element method and the modal test analysis method of single point excitation multi-point response, to determine whether test frequency range meets the requirements. Results The force signal at the contact surface, the resultant force at the center of mass and the acceleration signal at the crucial location could be measured. External interference could be effectively isolated. Background noise: force signal ≤0.07 N (maximum), ≤0.02 N(RMS), acceleration signal≤1.5 mg (maximum), ≤0.1 mg (RMS). Micro-vibration signal could also be recognized. Resolution: acceleration 5×105 grms, force 1×102 N, torque 1×102 N•m. The test band was within 320 Hz. Conclusion It meets model requirement and is put into use. |
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