Dynamic characteristics of two degree-of-freedom quasi-zero stiffness vibration isolation system with nonlinear springs

2021 ◽  
pp. 1-19
Author(s):  
Yanqi Liu ◽  
Wen Ji ◽  
Erjie Deng ◽  
Xin Wang ◽  
Chunfang Song
Keyword(s):  
Dynamic Characteristics ◽  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Nonlinear Springs ◽  
Two Degree Of Freedom

Numerical Study on the Application of Chaos in Line Spectrum Reduction

2009 ◽  
Author(s):  
Jingjun Lou ◽  
Shijian Zhu
Keyword(s):  
Power Flow ◽  
Vibration Isolation ◽  
Numerical Study ◽  
Excitation Amplitude ◽  
Point Of View ◽  
Line Spectrum ◽  
Chaotic State ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Two Degree Of Freedom

The application of chaos method in line spectrum reduction is numerically studied. The nonlinear dynamics and the power flow transmissibility of a two-degree-of-freedom vibration isolation system with nonlinear spring are analyzed. The dynamic behavior distribution chart of the system is obtained. Cascades of bifurcation of the system with different excitation amplitude are also gained. The isolation effectiveness is analyzed from the point of view of energy. The numerical results show that the reduction of the line spectrum in chaotic state is much greater than that in non-chaotic state.

Fuzzy control of a semi-active multiple degree-of-freedom vibration isolation system

2013 ◽  
Vol 21 (8) ◽  
pp. 1608-1621 ◽  
Author(s):  
Chunsheng Song ◽  
Zude Zhou ◽  
Shengquan Xie ◽  
Yefa Hu ◽  
Jinguang Zhang ◽  
...  
Keyword(s):  
Fuzzy Control ◽  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System

Passage Through Resonance in a Vibration Isolation System (Effects of Rate of Increasing the Voltage Applied to D.C. Motor)

2007 ◽  
Author(s):  
Tomohiko Tange ◽  
Ryo Kawana ◽  
Tetsuro Tokoyoda ◽  
Masatsugu Yoshizawa ◽  
Toshihiko Sugiura
Keyword(s):  
Rigid Body ◽  
Internal Resonance ◽  
Vibration Isolation ◽  
Transient Behavior ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Rotational Vibration ◽  
Three Degree Of Freedom ◽  
Driving Torque

This paper deals with transient nonlinear vibration of a rigid body suspended on a foundation by elastic springs and constrained in a plane. In such a three degree-of-freedom vibration isolation system, we assume that ‘2-1-1’ internal resonance exists between the vertical and horizontal vibrations of the rigid body and the rotational vibration about its center of gravity. Our main purpose is to examine theoretically the transient behavior passing through resonance under the condition that the D.C. motor directly drives the unbalanced rotor. Numerical simulation was carried out to clarify effects of rate of increasing V(t) on the peak amplitude of the vibration of the rigid body and on the driving torque of the D.C. motor. Moreover, experiment was conducted with a physical model of a three degree-of-freedom vibration isolation system, and the transient behavior passing through resonance was observed and compared with theoretical results in a typical case with internal resonance.

scholarly journals An inerter-based active vibration isolation system

2018 ◽  
Vol 148 ◽  
pp. 11001
Author(s):  
Neven Alujević ◽  
Damjan Čakmak ◽  
Hinko Wolf ◽  
Marko Jokić
Keyword(s):  
Kinetic Energy ◽  
Control Systems ◽  
Vibration Isolation ◽  
Theoretical Study ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Dynamic Excitation ◽  
Active Vibration ◽  
Two Degree Of Freedom ◽  
Active Vibration Isolation

This paper presents a theoretical study on passive and active vibration isolation schemes using inerter elements in a two degree of freedom (DOF) mechanical system. The aim of the work is to discuss basic capabilities and limitations of the vibration control systems at hand using simple and physically transparent models. Broad frequency band dynamic excitation of the source DOF is assumed. The purpose of the isolator system is to prevent vibration transmission to the receiving DOF. The frequency averaged kinetic energy of the receiving mass is used as the metric for vibration isolation quality. It is shown that the use of inerter in the passive and active vibration isolation schemes considered enhances the isolation effect.

Sign in / Sign up

Export Citation Format

Share Document