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Limit cycle behavior of smart fluid dampers under closed loop control

Sims, N.D. (2006) Limit cycle behavior of smart fluid dampers under closed loop control. Journal of Vibration and Acoustics, Transactions of the ASME, 128 (4). pp. 413-428. ISSN 1528-8927

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Semiactive vibration dampers offer an attractive compromise between the simplicity and fail safety of passive devices, and the weight, cost, and complexity of fully active systems. In addition, the dissipative nature of semiactive dampers ensures they always remain stable under closed loop control, unlike their fully active counterparts, However undesirable limit cycle behavior remains a possibility, which is not always property considered during the controller design. Smart fluids provide an elegant means to produce semiactive damping, since their resistance to flow can be directly controlled by the application of an electric or magnetic field. However the nonlinear behavior of smart fluid dampers makes it difficult to design effective controllers, and so a wide variety of control strategies has been proposed in the literature. In general, this work has overlooked the possibility of undesirable limit cycle behavior under closed loop conditions. The aim of the present study is to demonstrate how the experimentally observed limit cycle behavior of smart dampers can be predicted and explained by appropriate nonlinear models. The study is based upon a previously developed feedback control strategy, but the techniques described are relevant to other forms of smart damper control.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright (c) 2006 ASME. This is an author produced version of a paper published in ' Journal of Vibration and Acoustics, Transactions of the ASME '.
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Mr Christopher Hardwick
Date Deposited: 04 Dec 2009 14:55
Last Modified: 08 Feb 2013 16:59
Published Version: http://dx.doi.org/10.1115/1.2212444
Status: Published
Publisher: ASME
Refereed: Yes
Identification Number: 10.1115/1.2212444
URI: http://eprints.whiterose.ac.uk/id/eprint/9272

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