Abstract: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 existing three-parameter model. The mathematical model was established and influences of each parameter on system performance was analyzed. For established theoretical model, Simulink was used for simulation verification. Compared with the passive isolation system, it was shown that the four-parameter system can reduce the transmission rate amplitude at 7Hz natural frequency by 28.85dB; using 100Hz 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.
蒲华燕,何文元,孙翊,丁基恒,罗均,谢少荣,彭艳,王敏. 基于频变阻尼特性的四参数隔振系统建模与参数分析[J]. 振动与冲击, 2021, 40(24): 128-135.
PU Huayan,HE Wenyuan,SUN Yi,DING Jiheng,LUO Jun,XIE Shaorong,PENG Yan,WANG Min. Modeling and parameter analysis of a four-parameter isolation system based on frequency-dependent damping characteristics. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(24): 128-135.
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