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Active Vibration Control of Elastic Beam by Means of Shape Memory Alloy LayersThe mathematical model of a flexible beam covered with shape memory alloy (SMA) layers is presented. The SMA layers are used as actuators, which are capable of changing their elastic modulus and recovery stress, thus changing the natural frequency of, and adjusting the excitation to, the vibrating beam. The frequency factor variation as a function of SMA Young's modulus, SMA layer thickness and beam thickness is discussed. Also control of the beam employing an optimal linear control law is evaluated. The control results indicate how the system reacts to various levels of excitation input through the non-homogeneous recovery shear term of the governing differential equation.
Document ID
19990094055
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Chen, Q.
(Florida International Univ. Miami, FL United States)
Levy, C.
(Florida International Univ. Miami, FL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1996
Publication Information
Publication: Smart Materials Structures
Publisher: IOP Publishing Ltd.
Volume: 5
ISSN: 0964-1726
Subject Category
Structural Mechanics
Funding Number(s)
CONTRACT_GRANT: NAG1-1787
Distribution Limits
Public
Copyright
Other

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