Benefit of Relaxation-Type Damping on the Performance of a Six-Degree-of-Freedom Microvibration Isolation Device for Control Moment Gyroscope

Autor: Xingtian Liu, Changbao Shao, Liping Zhou, Xiangsen Kong
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Shock and Vibration, Vol 2021 (2021)
Druh dokumentu: article
ISSN: 1070-9622
1875-9203
DOI: 10.1155/2021/6690192
Popis: In order to provide an ultraquiet environment for spacecraft payload, a six-degree-of-freedom microvibration isolation device for satellite control moment gyro (CMG) is proposed in this paper. The dynamic characteristics of the microvibration isolation device are analyzed theoretically and experimentally. The dynamic equations of the microvibration suppression device are established by using the Newton–Euler method. The dynamic responses are numerically solved and the frequency-domain characteristics of the microvibration isolation device under base excitation are analyzed. The analytical results are first verified numerically, and the two results are in good accordance. The experimental apparatus is built, and the vibration isolation performance is investigated. The acceleration transfer function is measured and the influence of the excitation amplitude on the vibration isolation performance is performed. It is shown that the amplification factor at the vicinity of the resonance frequency is within 10 dB, and the vibration isolation performance is significant at higher frequencies. The vibration attenuation performance at the main frequency of the CMG (100 Hz) is more than 30 dB. The microvibration suppression device can effectively suppress the microvibration generated by CMG during orbital operation.
Databáze: Directory of Open Access Journals
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