Coil-based Electromagnetic Damper and Actuator for Vibration Suppression of Cantilever Beams

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In this study, both an eddy current coil damper and an electromagnetic actuator were developed for the vibration suppression of a cantilever beam integrated with a copper coil and a permanent magnet. The control system for the vibration suppression of the electro-magneto-mechanically coupled beam that consists of a coil attached to an aluminum beam and a permanent magnet installed below the coil was proposed. Alternatively, the conductive coil can be passively and actively used as a damper and an actuator. The effects of various coil shapes including a cylindrical tube, a square tube and a circular sheet were investigated to determine optimal vibration suppression for the cantilever beam. The frequency response function of a beam with the theoretical model of the magnetic eddy current damping system was predicted and its accuracy was compared to the experimentally measured frequency response. Also, the results of the active control with a positive position feedback method were compared with those of the passive eddy current dampers with open and closed circuits. The experimental data showed that the tube type coils had much higher vibration suppression efficiency than the sheet type coil and the active vibration control strategy can be alternatively used to improve the electromagnetic damper system.
Publisher
SAGE PUBLICATIONS LTD
Issue Date
2009-12
Language
English
Article Type
Article
Keywords

EDDY-CURRENT DAMPER; CONTROL-SYSTEM; DESIGN; MODEL

Citation

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, v.20, no.18, pp.2237 - 2247

ISSN
1045-389X
DOI
10.1177/1045389X09352819
URI
http://hdl.handle.net/10203/93888
Appears in Collection
ME-Journal Papers(저널논문)
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