An adaptive electrodynamic metamaterial for the absorption of structural vibration
An adaptive electrodynamic metamaterial for the absorption of structural vibration
This paper presents an adaptive shunted electrodynamic metamaterial, for broadband robust vibration control. The study considers a unit cell of 12 miniature, low-cost proof-mass actuators for the control of vibration in a three degree-of-freedom structure subject to parametric uncertainty. In order to modify their dynamic responses, each actuator is connected to a shunt circuit consisting of a parallel resistor and a switched in/out inductor and capacitor. Provided the impedance of the actuator is cancelled out using a negative impedance, the shunt circuit is capable of tuning the resonance of the actuator up or down in frequency. An adaptive tuning approach is proposed, whereby the shunted actuator resonance frequencies are periodically switched to the centre frequencies of the highest magnitude bins of a real-time frequency analysis of the velocity measured on the structure. This approach is compared to a blind swept tuning method and a fixed-shunt tuning in terms of the robustness to parametric uncertainty, and in practical terms for realisation using analogue or digital shunt impedances.
Adaptive, Metamaterial, Robust, Shunt, Uncertainties, Vibration control
Singleton, Lawrence
f6f4a617-b532-4c75-a86d-ed52e4da2e48
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
21 July 2024
Singleton, Lawrence
f6f4a617-b532-4c75-a86d-ed52e4da2e48
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Singleton, Lawrence and Cheer, Jordan
(2024)
An adaptive electrodynamic metamaterial for the absorption of structural vibration.
Journal of Sound and Vibration, 582, [118414].
(doi:10.1016/j.jsv.2024.118414).
Abstract
This paper presents an adaptive shunted electrodynamic metamaterial, for broadband robust vibration control. The study considers a unit cell of 12 miniature, low-cost proof-mass actuators for the control of vibration in a three degree-of-freedom structure subject to parametric uncertainty. In order to modify their dynamic responses, each actuator is connected to a shunt circuit consisting of a parallel resistor and a switched in/out inductor and capacitor. Provided the impedance of the actuator is cancelled out using a negative impedance, the shunt circuit is capable of tuning the resonance of the actuator up or down in frequency. An adaptive tuning approach is proposed, whereby the shunted actuator resonance frequencies are periodically switched to the centre frequencies of the highest magnitude bins of a real-time frequency analysis of the velocity measured on the structure. This approach is compared to a blind swept tuning method and a fixed-shunt tuning in terms of the robustness to parametric uncertainty, and in practical terms for realisation using analogue or digital shunt impedances.
Text
Adaptive_Swept_Shunt_JSV_v9_withlib
- Accepted Manuscript
Text
1-s2.0-S0022460X24001779-main
- Proof
More information
Accepted/In Press date: 25 March 2024
e-pub ahead of print date: 26 March 2024
Published date: 21 July 2024
Additional Information:
Publisher Copyright:
© 2024 The Author(s)
Keywords:
Adaptive, Metamaterial, Robust, Shunt, Uncertainties, Vibration control
Identifiers
Local EPrints ID: 488879
URI: http://eprints.soton.ac.uk/id/eprint/488879
ISSN: 0022-460X
PURE UUID: 7015f587-edb5-4f71-8338-1a7a5cbf03ac
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Date deposited: 09 Apr 2024 09:59
Last modified: 03 Sep 2024 01:45
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Author:
Lawrence Singleton
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