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Acceleration feedback control of human-induced floor vibrations

Diaz, I.M and Reynolds, P. (2010) Acceleration feedback control of human-induced floor vibrations. Engineering Structures , 32 (1). pp. 163-173. ISSN 0141-0296

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Active vibration control (AVC) via a proof-mass actuator is considered to be a suitable technique for the mitigation of vibrations caused by human motions in floor structures. It has been observed that actuator dynamics strongly influence structure dynamics despite considering collocated actuator/sensor control. The well-known property of the interlacing of poles and zeros of a collocated control system is no longer accomplished. Therefore, velocity-based feedback control, which has been previously used by other researchers, might not be a good solution. This work presents a design process for a control scheme based on acceleration feedback control with a phase-lag compensator, which will generally be different from an integrator circuit. This first-order compensator is applied to the output (acceleration) in such a way that the relative stability and potential damping to be introduced are significantly increased accounting for the interaction between floor and actuator dynamics. Additionally, a high-pass filter designed to avoid stroke saturation is applied to the control signal. The AVC system designed according to this procedure has been assessed in simulation and successfully implemented in an in-service open-plan office floor. The actual vibration reductions achieved have been approximately 60% for walking tests and over 90% for a whole-day vibration monitoring. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type: Article
Copyright, Publisher and Additional Information: © 2010 Elsevier. This is an author produced version of a paper subsequently published in Engineering Structures. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Active control; Structural control; Floor vibration; Saturated control; Acceleration feedback; Human-induced vibration
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 18 Jan 2010 09:22
Last Modified: 08 Feb 2013 16:59
Published Version: http://dx.doi.org/10.1016/j.engstruct.2009.09.003
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.engstruct.2009.09.003
URI: http://eprints.whiterose.ac.uk/id/eprint/10275

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