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Switching and sweeping vibration absorbers: theory and experimental validation

Switching and sweeping vibration absorbers: theory and experimental validation
Switching and sweeping vibration absorbers: theory and experimental validation

This paper investigates the principal properties of time varying operation modes for tuneable vibration absorbers mounted on distributed structures to reduce vibrations produced by stationary broad frequency band disturbances. The study considers a practical application where an electro-mechanical tuneable vibration absorber, comprising a seismic coil-magnet linear transducer, is fixed on a thin walled circular duct flexible structure. The absorber is commanded to either periodically switch or continuously vary the stiffness and damping of the elastic suspension holding the moving magnet. As a result, the tuneable vibration absorber fundamental natural frequency and damping ratio are respectively switched or swept to cyclically reduce the resonant response of multiple flexural natural modes of the duct structure. The study analytically shows, and confirms with simulations and experiments, that the vibration control produced by a simple “blind sweep” operation mode of the tuneable vibration absorber does not differ significantly from the (sub)optimal performance attainable via a switching operation mode.

0005-1098
290-301
Miani, Stefano
46e208e4-6664-47b1-83bf-6cad30f55716
Zilletti, Michele
68960e3a-3346-46ff-9283-d3186adc2b45
Gardonio, Paolo
bae5bf72-ea81-43a6-a756-d7153d2de77a
Blanchini, Franco
95130cdd-f037-4a27-9f04-c81772182cc4
Colaneri, Patrizio
251c9861-e43e-4af9-b0b4-9c10387d649b
Miani, Stefano
46e208e4-6664-47b1-83bf-6cad30f55716
Zilletti, Michele
68960e3a-3346-46ff-9283-d3186adc2b45
Gardonio, Paolo
bae5bf72-ea81-43a6-a756-d7153d2de77a
Blanchini, Franco
95130cdd-f037-4a27-9f04-c81772182cc4
Colaneri, Patrizio
251c9861-e43e-4af9-b0b4-9c10387d649b

Miani, Stefano, Zilletti, Michele, Gardonio, Paolo, Blanchini, Franco and Colaneri, Patrizio (2018) Switching and sweeping vibration absorbers: theory and experimental validation. Automatica, 93, 290-301. (doi:10.1016/j.automatica.2018.03.021).

Record type: Article

Abstract

This paper investigates the principal properties of time varying operation modes for tuneable vibration absorbers mounted on distributed structures to reduce vibrations produced by stationary broad frequency band disturbances. The study considers a practical application where an electro-mechanical tuneable vibration absorber, comprising a seismic coil-magnet linear transducer, is fixed on a thin walled circular duct flexible structure. The absorber is commanded to either periodically switch or continuously vary the stiffness and damping of the elastic suspension holding the moving magnet. As a result, the tuneable vibration absorber fundamental natural frequency and damping ratio are respectively switched or swept to cyclically reduce the resonant response of multiple flexural natural modes of the duct structure. The study analytically shows, and confirms with simulations and experiments, that the vibration control produced by a simple “blind sweep” operation mode of the tuneable vibration absorber does not differ significantly from the (sub)optimal performance attainable via a switching operation mode.

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More information

Accepted/In Press date: 31 January 2018
e-pub ahead of print date: 3 April 2018
Published date: 1 July 2018

Identifiers

Local EPrints ID: 426531
URI: http://eprints.soton.ac.uk/id/eprint/426531
ISSN: 0005-1098
PURE UUID: c2882583-67ca-411d-886b-ca5f84976365

Catalogue record

Date deposited: 30 Nov 2018 17:30
Last modified: 13 Mar 2019 17:46

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