A three-degree-of-freedom hybrid vibration isolation system using adaptive proportional control supported by passive weight support mechanism

2013 ◽  
Author(s):  
Yun-Hui Liu ◽  
Wei-Hao Wu ◽  
Chih-Liang Chu
Keyword(s):  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Proportional Control ◽  
Support Mechanism ◽  
Weight Support ◽  
Three Degree Of Freedom

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.

Passage Through Resonance in a Three Degree-of-Freedom Vibration Isolation System

2005 ◽  
Author(s):  
Ryo Kawana ◽  
Tetsuro Tokoyoda ◽  
Kazushige Sato ◽  
Masatsugu Yoshizawa ◽  
Toshihiko Sugiura
Keyword(s):  
Rigid Body ◽  
Vibration Isolation ◽  
Transient Behavior ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Unbalanced Rotor ◽  
Rotational Vibration ◽  
Three Degree Of Freedom ◽  
Theoretical Results

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. Next, the vibration of the rigid body is captured into or passes through resonance when the rotation speed of an unbalanced rotor equipped with the rigid body is increased. We theoretically examined the transient behavior of passage through resonance under the condition that a DC motor directly drives the unbalanced rotor with a limited electric current. Moreover, the experiment was conducted with a physical model of such a system, and transient oscillations through resonance were observed and compared with theoretical results in a few cases of limited currents.

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
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