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Vibration isolation with smart fluid dampers: a benchmarking study

Batterbee, D.C. and Sims, N.D. (2005) Vibration isolation with smart fluid dampers: a benchmarking study. Smart Structures and Systems, 1 (3). pp. 235-256. ISSN 1738-1991

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The non-linear behaviour of electrorheological (ER) and magnetorheological (MR) dampers makes it difficult to design effective control strategies, and as a consequence a wide range of control systems have been proposed in the literature. These previous studies have not always compared the performance to equivalent passive systems, alternative control designs, or idealised active systems. As a result it is often impossible to compare the performance of different smart damper control strategies. This article provides some insight into the relative performance of two MR damper control strategies: on/off control and feedback linearisation. The performance of both strategies is benchmarked against ideal passive, semi-active and fully active damping. The study relies upon a previously developed model of an MR damper, which in this work is validated experimentally under closed-loop conditions with a broadband mechanical excitation. Two vibration isolation case studies are investigated: a single-degree-of-freedom mass-isolator, and a two-degree-of-freedom system that represents a vehicle suspension system. In both cases, a variety of broadband mechanical excitations are used and the results analysed in the frequency domain. It is shown that although on/off control is more straightforward to implement, its performance is worse than the feedback linearisation strategy, and can be extremely sensitive to the excitation conditions.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright (c) 2005 Techno Press. This is an author produced version of a paper published in ' Smart Structures and Systems '. Uploaded with permission from the publisher.
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: 23 Oct 2009 14:14
Last Modified: 08 Feb 2013 16:59
Status: Published
Publisher: Techno press
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/9270

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