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Open AccessArticle

Design, Experiment, and Improvement of a Quasi-Zero-Stiffness Vibration Isolation System

by Shuai Wang 1,2,3, Wenpen Xin 2,3,4, Yinghao Ning 2,3, Bing Li 2,3,* and Ying Hu 5,*
1
Dongguan University of Technology, Dongguan 523808, China
2
State Key Laboratory of Robotics and System (HIT), Harbin 150001, China
3
Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
4
CRRC Qingdao Sifang Rolling Stock Co., Ltd., Qingdao 266111, China
5
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(7), 2273; https://doi.org/10.3390/app10072273
Received: 19 February 2020 / Revised: 12 March 2020 / Accepted: 14 March 2020 / Published: 27 March 2020
(This article belongs to the Section Mechanical Engineering)
This paper proposes a new kind of quasi-zero-stiffness (QZS) isolation system that has the property of low-dynamic but high-static stiffness. The negative stiffness was produced using two magnetic rings, the magnetization of which is axial. First, the force–displacement characteristic of the two coupled magnetic rings was developed and the relationship between the parameters of the magnetic rings and the stiffness of the system was investigated. Then, the dynamic response of the QZS was analyzed. The force transmissibility of the system was calculated and the effects of the damping ratio and excitation amplitude on the isolation performance were investigated. The prototype of the QZS system was developed to verify the isolation effects of the system based on a comparison with a linear vibration isolation platform. Lastly, the improvement of the QZS system was conducted based on changing the heights of the ring magnets and designing a proper non-linear spring. The analysis shows the QZS system after improvement shows better isolation effects than that of the non-improved system. View Full-Text
Keywords: vibration isolation; quasi-zero-stiffness; magnetic rings spring; transmissibility; improvement of the load capacity vibration isolation; quasi-zero-stiffness; magnetic rings spring; transmissibility; improvement of the load capacity
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Wang, S.; Xin, W.; Ning, Y.; Li, B.; Hu, Y. Design, Experiment, and Improvement of a Quasi-Zero-Stiffness Vibration Isolation System. Appl. Sci. 2020, 10, 2273.

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