Modeling and parameter analysis of a four-parameter isolation system based on frequency-dependent damping characteristics

被引：0
|
作者：
Pu H. [1 ]
He W. [1 ]
Sun Y. [1 ]
Ding J. [1 ]
Luo J. [1 ]
Xie S. [1 ]
Peng Y. [1 ]
Wang M. [1 ]
机构：
[1] School of Mechatronic Engineering and Automation, Shanghai University, Shanghai
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 24期
关键词：
Four-parameter system; Frequency-dependent damping; Normalized parameters; Parameter optimization; Vibration isolation;
D O I：
10.13465/j.cnki.jvs.2021.24.016
中图分类号：
学科分类号：
摘要：
With the rapid development of aerospace technology, the effective mission load in spacecraft has continuously higher requirements for reliability and stability of vibration isolators. In order to solve contradictions between low-frequency and high-frequency isolation performance in traditional passive isolators, a frequency-dependent isolation system that can achieve large damping at low frequencies and small damping at high frequencies is urgently needed. A four-parameter isolation system with frequency-dependent damping characteristics was proposed based on an existing three-parameter model. The mathematical model was established and influences of each parameter on system performance were analyzed. For established the theoretical model, Simulink was used for verification. Compared with the passive isolation system, it was shown that the four-parameter system can reduce the transmission rate amplitude at 7 Hz natural frequency by 28.85 dB; using 100 Hz sine signal excitation, the time-domain amplitude attenuation rate reaches 99.5%; the four-parameter system has low resonance peak and good high-frequency isolation performance. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：128 / 135
页数：7
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