Results 161 to 170 of about 351 (212)
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Review on Low Frequency Control of Quasi-Zero Stiffness
2021 13th International Conference on Computer and Automation Engineering (ICCAE), 2021Quasi-zero stiffness (QZS) vibration isolation system is composed of positive stiffness structure and negative stiffness structure. It can obtain high static stiffness and low dynamic stiffness near the static equilibrium position. The benefits of the QZS technology are to realize the low frequency vibration control and solve the contradiction of low ...
Bu-yun Li +3 more
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A Study of a Pendulum-Like Vibration Isolator With Quasi-Zero-Stiffness
Volume 9: 17th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC), 2021Abstract This article introduces a pendulum element to a 3-spring vibration isolator to achieve a high-static-low-dynamic (HSLD) stiffness or even quasi-zero stiffness (QZS) around the equilibrium position. Numerical simulation is given and the harmonic balance method (HBM) is used to obtain time responses for analysis.
Tian, Yishen, Cao, Dengqing, Wang, Yan
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A quasi-zero-stiffness dynamic vibration absorber
Journal of Sound and Vibration, 2021Abstract Dynamic vibration absorbers (DVAs) are practical solutions for vibration absorption. However, it is still a challenge to absorb ultra-low frequency vibration. In this paper, a quasi-zero-stiffness (QZS) DVA is proposed for ultra-low frequency vibration absorption. Firstly, the conceptual design of the QZS DVA is carried out by using a simple
Yaopeng Chang +3 more
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On the Characteristics and Practical Parameters Selection of a Quasi-Zero-Stiffness Isolator
International Journal of Structural Stability and Dynamics, 2022Quasi-zero-stiffness (QZS) isolators, characterized by high-static-low-dynamic stiffness (HSLDS), have attracted interest in the field of low-frequency vibration isolation. An existing QZS isolator, using horizontal springs in series with rigid oblique rods as a negative stiffness mechanism, has been proposed to obtain desirable low-frequency ...
Piao Sheng, Shuangxi Jing, Zhenhua Zhang
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A bidirectional quasi-zero stiffness metamaterial for impact attenuation
International Journal of Mechanical SciencesShutian Liu
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Optimization of a quasi-zero-stiffness isolator
Journal of Mechanical Science and Technology, 2007The frequency range over which a mount can isolate a mass from a vibrating base (or vice versa) is often limited by the mount stiffness required to support the weight of the mass. This compromise can be made more favourable by employing non-linear mounts with a softening spring characteristic such that small excursions about the static equilibrium ...
Carrella, A. +2 more
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Bursting oscillations in an isolation system with quasi-zero stiffness
Mechanical Systems and Signal Processing, 2021Abstract In this paper, we investigate the bursting oscillations in a vibration isolation system with quasi-zero stiffness to improve the efficiency and reliability. The complex nonlinear dynamics are studied by the bifurcation analysis of both generalized autonomous system and non-autonomous system to reveal the mechanism and modes of bursting ...
Yuntian Zhang, Qingjie Cao, Wenhu Huang
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An integrated design of quasi-zero stiffness mechanism
Journal of Mechanical Science and Technology, 2016Nonlinear Quasi-zero stiffness (QZS) mechanisms were studied to overcome the weakness of linear isolators. This paper presents an integrated design of the QZS mechanism. First, various types of QZS vibration mechanisms are analyzed and a generalized model for QZS mechanisms is derived.
Hyeong-Joon Ahn +2 more
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Displacement sensing with quasi-zero stiffness structure and flexoelectricity
Smart Materials and Structures, 2023Abstract Flexoelectricity is a strain-gradient-induced electromechanical coupling effect promising for high-resolution sensing. A novel displacement sensing method is developed based on long-range quasi-zero stiffness and flexoelectricity.
Haoyu Gu +4 more
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A torsion quasi-zero stiffness vibration isolator
Journal of Sound and Vibration, 2015Abstract A torsion vibration isolator with quasi-zero stiffness (QZS) is proposed to attenuate the transmission of torsional vibration along a shaft system, which also plays a role of coupling between shafts. A pre-compressed cam–roller mechanism is designed to provide torsional negative stiffness that counteracts with the positive torsion stiffness ...
Jiaxi Zhou, Daolin Xu, Steven Bishop
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