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research-article

Development of vibration isolator with controllable stiffness using permanent magnets and coils

[+] Author and Article Information
Kai Meng

99 Shangda Road, BaoShan District Shanghai, China No. 1 Xianghe Road, Longhu, Xinzheng, Zhengzhou City, Henan Province,China Shanghai, 200444 China mengkai2009@haue.edu.cn

Yi Sun

99 Shangda Road, BaoShan District Shanghai, Shanghai 200444 China yisun@shu.edu.cn

Huanyan Pu

99 Shangda Road, BaoShan District Shanghai, China Shanghai, 200444 China phygood_2001@shu.edu.cn

Jun Luo

99 Shangda Road, BaoShan District Shanghai, China Shanghai, 200444 China luojun@shu.edu.cn

Shujin Yuan

99 Shangda Road, BaoShan District Shanghai, China Shanghai, 200444 China shuysj@shu.edu.cn

Jinglei Zhao

99 Shangda Road, BaoShan District Shanghai, China Shanghai, 200444 China dalei@shu.edu.cn

Shaorong Xie

99 Shangda Road, BaoShan District Shanghai, China Shanghai, 200444 China srxie@shu.edu.cn

Yan Peng

99 Shangda Road, BaoShan District Shanghai, China Shanghai, 200444 China pengyan@shu.edu.cn

1Corresponding author.

Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the Journal of Vibration and Acoustics. Manuscript received January 7, 2019; final manuscript received April 1, 2019; published online xx xx, xxxx. Assoc. Editor: Stefano Lenci.

*This author contributed equally and should be the considered co-first author.

ASME doi:10.1115/1.4043413 History: Received January 07, 2019; Accepted April 02, 2019

Abstract

In this study, a novel vibration isolator is presented. The presented isolator possesses the controllable stiffness and can be employed in vibration isolation at a low resonance frequency. The controllable stiffness of the isolator is obtained by the manipulating negative stiffness based current in a system with a positive and negative stiffness in parallel. Using an electromagnetic device consisting of permanent magnetic rings and coils, the designed isolator shows that the stiffness can be manipulated as needed and the operational stiffness range is large in vibration isolation. We experimentally demonstrate the modeling of controllable stiffness and the approximation of the negative stiffness expressions are effective for controlling the resonance frequency and transmissibility of the vibration isolation system, enhancing applications such as warship stealth technology, vehicles suspension system and active vibration isolator.

Copyright © 2019 by ASME
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