Variable Friction Device for Structural Control based on Duo-Servo Vehicle Brake: Modeling and Experimental Validation Cao, Liang Downey, Austin Laflamme, Simon Laflamme, Simon Taylor, Douglas Ricles, James
dc.contributor.department Civil, Construction and Environmental Engineering 2018-02-16T11:34:47.000 2020-06-30T01:13:45Z 2020-06-30T01:13:45Z Thu Jan 01 00:00:00 UTC 2015 2016-07-01 2015-07-01
dc.description.abstract <p>Supplemental damping can be used as a cost-effective method to reduce structural vibrations. In particular, passive systems are now widely accepted and have numerous applications in the field. However, they are typically tuned to specific excitations and their performances are bandwidth-limited. A solution is to use semi-active devices, which have shown to be capable of substantially enhanced mitigation performance. The authors have recently proposed a new type of semi-active device, which consists of a variable friction mechanism based on a vehicle duo-servo drum brake, a mechanically robust and reliable technology. The theoretical performance of the proposed device has been previously demonstrated via numerical simulations. In this paper, we further the understanding of the device, termed Modified Friction Device (MFD) by fabricating a small scale prototype and characterizing its dynamic behavior. While the dynamics of friction is well understood for automotive braking technology, we investigate for the first time the dynamic behavior of this friction mechanism at low displacements and velocities, in both forward and backward directions, under various hydraulic pressures. A modified 3-stage dynamic model is introduced. A LuGre friction model is used to characterize the friction zone (Stage 1), and two pure stiffness regions to characterize the dynamics of the MFD once the rotation is reversed and the braking shoes are sticking to the drum (Stage 2) and the rapid build up of forces once the shoes are held by the anchor pin (Stage 3). The proposed model is identified experimentally by subjecting the prototype to harmonic excitations. It is found that the proposed model can be used to characterize the dynamics of the MFD, and that the largest fitting error arises at low velocity under low pressure input. The model is then verified by subjecting the MFD to two different earthquake excitations under different pressure inputs. The model is capable of tracking the device׳s response, despite a lower fitting performance under low pressure and small force output, as it was found in the harmonic tests due to the possible nonlinearity in Stage 2 of the model.</p>
dc.description.comments <p>NOTICE: this is the author’s version of a work that was accepted for publication in <em>Journal of Sound and Vibration</em>. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in <em>Journal of Sound and Vibration</em>, 348(21)July 2015; 41-56. Doi: <a href="" id="x-x-ddDoi" target="_blank">10.1016/j.jsv.2015.03.011</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1074
dc.identifier.contextkey 7181372
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ccee_pubs/75
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 01:49:03 UTC 2022
dc.source.uri 10.1016/j.jsv.2015.03.011
dc.subject.disciplines Civil Engineering
dc.subject.disciplines Construction Engineering and Management
dc.subject.disciplines Electrical and Electronics
dc.subject.disciplines Environmental Engineering
dc.subject.disciplines Structural Engineering
dc.subject.keywords Variable friction
dc.subject.keywords semi active device
dc.subject.keywords supplemental damping
dc.subject.keywords structural control
dc.subject.keywords modified friction device
dc.subject.keywords LuGre model
dc.title Variable Friction Device for Structural Control based on Duo-Servo Vehicle Brake: Modeling and Experimental Validation
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 84547f08-8710-4934-b91e-ba5f46ab9abe
relation.isOrgUnitOfPublication 933e9c94-323c-4da9-9e8e-861692825f91
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