Dynamic characteristics of semi active inerter-based vibration isolator with relative acceleration-relative velocity control

WANG Yong1,2,WANG Ruochen1, MENG Haodong3, ZHANG Buyun1

Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (21) : 194-201.

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PDF(1477 KB)
Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (21) : 194-201.

Dynamic characteristics of semi active inerter-based vibration isolator with relative acceleration-relative velocity control

  • WANG Yong1,2,WANG Ruochen1, MENG Haodong3, ZHANG Buyun1
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Abstract

A semi-active inerter with its inertance adjustable was applied in a vibration isolator.Based on its mechanical features, the relative acceleration-relative velocity control strategy was proposed to adjust its inertance between the maximum value and the minimum one.The dynamic characteristics of 3-element parallel connection and series connection semi-active inerter-based vibration isolators under base harmonic excitation were studied.The dynamic response of the system was solved using the averaging method, and compared with the numerical solution.Four performance evaluation indexes including dynamic displacement peak value, absolute displacement transmissibility peak value, vibration isolation frequency band and high frequency band absolute displacement transmissibility were defined to evaluate the system’s vibration isolation performance.The evaluating results were compared with those of the passive inerter-based vibration isolator.The results showed that compared with passive inerter-based vibration isolators, semi-active inerter-based vibration isolators have better vibration isolation performance.

Key words

semi-active inerter / vibration isolator / relative-acceleration-relative-velocity control / averaging method / dynamic characteristics

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WANG Yong1,2,WANG Ruochen1, MENG Haodong3, ZHANG Buyun1. Dynamic characteristics of semi active inerter-based vibration isolator with relative acceleration-relative velocity control[J]. Journal of Vibration and Shock, 2019, 38(21): 194-201

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