Experimental multimode traveling waves identification in an acoustic waveguide
Experimental multimode traveling waves identification in an acoustic waveguide
An essential part of nondestructive testing and experimental modeling of waveguides is the decomposition of propagating wave patterns. The traveling wave ratio is a measure of partial reflections assisting in quantifying the pureness of a single traveling wave from a power flow perspective. This paper expands the notion of traveling wave ratio for multimode systems and outlines several schemes capable of decomposing the waves into their different traveling modes while quantifying their traveling and standing proportions individually. A method to strike an optimal balance between increasing model order and to maintain low uncertainty is proposed. An experimental study performed on an acoustic wave tube, which utilizes the various methods while assessing their accuracy and performance, is reported. The results described here emphasize the importance of including additional propagating modes. In addition, the results illustrate the capability of using the recursive multichannel least-mean-squares method for both a fast decomposition and as a basis to formulate closed-loop schemes controlling the wave’s propagation patterns.
Vered, Yoav
c13938de-457b-4e25-b57b-7471c7bc832a
Bucher, Izhak
53f51e1b-46cb-45f6-b812-14cc3a0be938
15 May 2021
Vered, Yoav
c13938de-457b-4e25-b57b-7471c7bc832a
Bucher, Izhak
53f51e1b-46cb-45f6-b812-14cc3a0be938
Vered, Yoav and Bucher, Izhak
(2021)
Experimental multimode traveling waves identification in an acoustic waveguide.
Mechanical Systems and Signal Processing, 153, [107515].
(doi:10.1016/j.ymssp.2020.107515).
Abstract
An essential part of nondestructive testing and experimental modeling of waveguides is the decomposition of propagating wave patterns. The traveling wave ratio is a measure of partial reflections assisting in quantifying the pureness of a single traveling wave from a power flow perspective. This paper expands the notion of traveling wave ratio for multimode systems and outlines several schemes capable of decomposing the waves into their different traveling modes while quantifying their traveling and standing proportions individually. A method to strike an optimal balance between increasing model order and to maintain low uncertainty is proposed. An experimental study performed on an acoustic wave tube, which utilizes the various methods while assessing their accuracy and performance, is reported. The results described here emphasize the importance of including additional propagating modes. In addition, the results illustrate the capability of using the recursive multichannel least-mean-squares method for both a fast decomposition and as a basis to formulate closed-loop schemes controlling the wave’s propagation patterns.
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Experimental multimode traveling waves identification in an acoustic waveguide
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preprint Experimental multimode traveling waves identification in an acoustic waveguide
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Accepted/In Press date: 29 November 2020
e-pub ahead of print date: 30 December 2020
Published date: 15 May 2021
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Local EPrints ID: 457172
URI: http://eprints.soton.ac.uk/id/eprint/457172
ISSN: 0888-3270
PURE UUID: 5dbc7a43-29ea-47b9-9268-e7bfa20db4ce
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Date deposited: 25 May 2022 16:56
Last modified: 16 Mar 2024 17:19
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Author:
Yoav Vered
Author:
Izhak Bucher
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