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Proceedings Paper

Vibration control of a beam using linear magnetostrictive actuators
Author(s): Seok-Jun Moon; Chae-Wook Lim; Byung-Hyun Kim; Young-Jin Park
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Paper Abstract

Terfenol-D is one of magnetostrictive materials with the property of converting the energy in magnetic field into mechanical motion, and vice versa. We designed and fabricated a linear magnetostrictive actuator using Terfenol-D as a control device. In order to grasp the dynamic characteristics of the actuator, a series of experimental and numerical tests were performed. Induced-strain actuation displacements of the actuator measured by the test and predicted by magnetic analysis agreed well. And blocked forces according to the input currents were estimated from the testing results. Modeling method representing the exerting force of the actuator was confirmed through some testing results. We also explored the effectiveness of the linear magnetostrictive actuator as a structural control device. A series of numerical and experimental tests was carried out with simple aluminum beam only supported at each end by the actuator. After the equation of motion of the controlled system was obtained by the finite element method, a model reduction was performed to reduce the numbers of degree of freedom. A linear quadratic feedback controller was realized on a real-time digital control system to damp the first four elastic modes of the beam. Through some tests, we confirmed the possibility of the actuator for controlling beam-like structures.

Paper Details

Date Published: 16 May 2005
PDF: 8 pages
Proc. SPIE 5760, Smart Structures and Materials 2005: Damping and Isolation, (16 May 2005); doi: 10.1117/12.597966
Show Author Affiliations
Seok-Jun Moon, Korea Institute of Machinery & Materials (South Korea)
Chae-Wook Lim, Korea Advanced Institute of Science and Technology (South Korea)
Byung-Hyun Kim, Korea Institute of Machinery & Materials (South Korea)
Young-Jin Park, Korea Advanced Institute of Science and Technology (South Korea)

Published in SPIE Proceedings Vol. 5760:
Smart Structures and Materials 2005: Damping and Isolation
Kon-Well Wang, Editor(s)

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