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Dynamic Analysis of Mechanical Controlled Two Degree-of-Freedom QZS Vibration Isolators | IEEE Conference Publication | IEEE Xplore

Dynamic Analysis of Mechanical Controlled Two Degree-of-Freedom QZS Vibration Isolators

Publisher: IEEE

Abstract:

A basic one degree-of-freedom (1DOF) quasi-zero stiffness (QZS) vibration isolator is composed of two lateral springs used as negative stiffness mechanism and one vertica...View more

Abstract:

A basic one degree-of-freedom (1DOF) quasi-zero stiffness (QZS) vibration isolator is composed of two lateral springs used as negative stiffness mechanism and one vertical spring used as positive stiffness mechanism. Three types of two degree of freedom (2DOF) isolators are composed of the 1DOF isolators in series, namely grounded-grounded model (GGM), bottom-springs grounded model (BGM) and top-springs grounded model (TGM). In this paper, these three models are improved with a method of mechanical control and the displacement transmissibility equations of them are derived. Then, the simulation comparison is made. The results show that the performance of the three mechanical controlled models is significantly better than that of the former.
Date of Conference: 04-06 August 2023
Date Added to IEEE Xplore: 25 September 2023
ISBN Information:

ISSN Information:

Publisher: IEEE
Conference Location: Jilin, China

I. Introduction

QZS vibration isolator is a typical nonlinear isolator that can achieve dynamic characteristics of quasi-zero or lower stiffness. A single degree of freedom (1DOF) QZS isolator typically consists of two side springs and one vertical spring. As a positive stiffness mechanism, vertical springs can support loads; The springs on both sides are negative stiffness mechanisms, which are combined with positive stiffness mechanisms to obtain the quasi-zero stiffness characteristics of the system. QZS vibration isolators have been widely used in engineering [1]–[5], which has led researchers to continuously conduct in-depth research on them to further improve their performance.

References

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