Active and Passive Vibration Control Using Electromagnetic Damper Systems
Date Issued
2008
Date
2008
Author(s)
Tai, Chun-yang
Abstract
In accordance with electromagnetic theory, when a conductive wire moves in a uniform magnetic field. It will generate an inductive current. And the charges of this induced current under the action of applied magnetic field experience a Lorentz force, and pass this Lorentz force whose direction is opposite to the moving direction of the wire, to the wire. According to this counteracting phenomenon, we make an electromagnetic damper and apply it to vibration control of cantilever beam. In this thesis, we first establish equations of vibration and simulate numerical active and passive. Next, we perform experimental test of passive vibration control and study the effect of system parameters on the alleviating the vibration amplitude. This agrees will with simulation results. In the active vibration control experiment, we add an electric circuit which can amplifier Lorentz force and therefore improve the control result. Finally, we also perform the experimental test of noise control and find that the result of amplitude reducing is very good.
Subjects
inductive current
Lorentz force
electromagnetic damper
vibration control
cantilever beam
Type
thesis
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