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Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications

Lijie Li Orcid Logo

Mechanical Systems and Signal Processing, Volume: 134, Start page: 106329

Swansea University Author: Lijie Li Orcid Logo

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DOI (Published version): 10.1016/j.ymssp.2019.106329

Abstract

Having simultaneously a high quality factor (i.e. a narrow resonant band) and a shorter decay time between the resonating system and the external sources (i.e. a wide resonant band) is a desirable characteristic for mechanical resonators, which however has been regarded as contradictory. This has be...

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Published in: Mechanical Systems and Signal Processing
ISSN: 08883270
Published: 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa51717
first_indexed 2019-09-06T15:26:52Z
last_indexed 2020-07-29T19:13:41Z
id cronfa51717
recordtype SURis
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spelling 2020-07-29T16:56:08.9438882 v2 51717 2019-09-06 Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications ed2c658b77679a28e4c1dcf95af06bd6 0000-0003-4630-7692 Lijie Li Lijie Li true false 2019-09-06 ACEM Having simultaneously a high quality factor (i.e. a narrow resonant band) and a shorter decay time between the resonating system and the external sources (i.e. a wide resonant band) is a desirable characteristic for mechanical resonators, which however has been regarded as contradictory. This has been known as the limit of Lorentz reciprocity. We explore a configuration to achieve this desired characteristic within the mechanical regime. The configuration consists of a pair of mechanical resonators coupled together through their connecting part. One of them is encapsulated in a vacuum environment, and the other is left in the normal ambient condition. Numerical model of this configuration shows clearly the advantages such as: (a), sensitivity to the change of resonant frequency is greatly improved (the product of bandwidth and the decay time has increased at least two orders of magnitude); (b), the value of can be adjusted through the coupling stiffness. Journal Article Mechanical Systems and Signal Processing 134 106329 08883270 1 12 2019 2019-12-01 10.1016/j.ymssp.2019.106329 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2020-07-29T16:56:08.9438882 2019-09-06T13:42:42.5730510 Lijie Li 0000-0003-4630-7692 1 0051717-06092019185257.pdf mechanicalnon-reciprocity.pdf 2019-09-06T18:52:57.1430000 Output 1369549 application/pdf Accepted Manuscript true 2020-09-06T00:00:00.0000000 © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ false eng
title Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
spellingShingle Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
Lijie Li
title_short Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
title_full Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
title_fullStr Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
title_full_unstemmed Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
title_sort Coupled mechanical resonators with broken Lorentz reciprocity for sensor applications
author_id_str_mv ed2c658b77679a28e4c1dcf95af06bd6
author_id_fullname_str_mv ed2c658b77679a28e4c1dcf95af06bd6_***_Lijie Li
author Lijie Li
author2 Lijie Li
format Journal article
container_title Mechanical Systems and Signal Processing
container_volume 134
container_start_page 106329
publishDate 2019
institution Swansea University
issn 08883270
doi_str_mv 10.1016/j.ymssp.2019.106329
document_store_str 1
active_str 0
description Having simultaneously a high quality factor (i.e. a narrow resonant band) and a shorter decay time between the resonating system and the external sources (i.e. a wide resonant band) is a desirable characteristic for mechanical resonators, which however has been regarded as contradictory. This has been known as the limit of Lorentz reciprocity. We explore a configuration to achieve this desired characteristic within the mechanical regime. The configuration consists of a pair of mechanical resonators coupled together through their connecting part. One of them is encapsulated in a vacuum environment, and the other is left in the normal ambient condition. Numerical model of this configuration shows clearly the advantages such as: (a), sensitivity to the change of resonant frequency is greatly improved (the product of bandwidth and the decay time has increased at least two orders of magnitude); (b), the value of can be adjusted through the coupling stiffness.
published_date 2019-12-01T13:54:16Z
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score 11.048107

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