Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes

In active structural acoustic control, broadband control of the radiated sound power from a structure can be achieved by minimizing the amplitudes of the acoustic radiation modes (ARMs). The shape of these ARMs is frequency dependent and only a few might radiate significant power in a given frequenc...

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Main Authors:	Md Nor, Khairul Affendy, Mace, Brian R., Hioka, Yusuke
Format:	Conference or Workshop Item
Language:	English English
Published:	International Institute of Acoustics and Vibration, IIAV 2017
Subjects:	TA365 Acoustics in engineering. Acoustical engineering
Online Access:	http://irep.iium.edu.my/72804/ http://irep.iium.edu.my/72804/ http://irep.iium.edu.my/72804/9/72804_Adaptive%20control%20of%20radiated%20sound%20power_complete.pdf http://irep.iium.edu.my/72804/1/72804_Adaptive%20control%20of%20radiated%20sound_SCOPUS.pdf

id	iium-72804
recordtype	eprints
spelling	iium-728042019-07-08T08:38:44Z http://irep.iium.edu.my/72804/ Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke TA365 Acoustics in engineering. Acoustical engineering In active structural acoustic control, broadband control of the radiated sound power from a structure can be achieved by minimizing the amplitudes of the acoustic radiation modes (ARMs). The shape of these ARMs is frequency dependent and only a few might radiate significant power in a given frequency range. In this paper a method is described by which the ARMs are estimated in real-time from a number of point response measurements taken on a vibrating structure. These estimates can be used to calculate the radiated power or, here, in a feedforward adaptive control system. Estimates of the ARM amplitudes in the time domain are produced by digitally filtering the outputs of an array of sensors mounted on the radiator. These filters are designed by FIR filters in the frequency domain based on the frequency-dependent ARMs and implemented in the time domain. These estimates are then used as the cost function in a feedforward, adaptive, filtered-X LMS controller. The theory is described with reference to a 2-dimensional vibrating structure. Finally numerical results of real-time simulations are presented. International Institute of Acoustics and Vibration, IIAV 2017-07 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/72804/9/72804_Adaptive%20control%20of%20radiated%20sound%20power_complete.pdf application/pdf en http://irep.iium.edu.my/72804/1/72804_Adaptive%20control%20of%20radiated%20sound_SCOPUS.pdf Md Nor, Khairul Affendy and Mace, Brian R. and Hioka, Yusuke (2017) Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes. In: 24th International Congress on Sound and Vibration, ICSV 2017 2017, 23rd-27th July 2017, London; United Kingdom. https://www.iiav.org/icsv24/
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TA365 Acoustics in engineering. Acoustical engineering
spellingShingle	TA365 Acoustics in engineering. Acoustical engineering Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
description	In active structural acoustic control, broadband control of the radiated sound power from a structure can be achieved by minimizing the amplitudes of the acoustic radiation modes (ARMs). The shape of these ARMs is frequency dependent and only a few might radiate significant power in a given frequency range. In this paper a method is described by which the ARMs are estimated in real-time from a number of point response measurements taken on a vibrating structure. These estimates can be used to calculate the radiated power or, here, in a feedforward adaptive control system. Estimates of the ARM amplitudes in the time domain are produced by digitally filtering the outputs of an array of sensors mounted on the radiator. These filters are designed by FIR filters in the frequency domain based on the frequency-dependent ARMs and implemented in the time domain. These estimates are then used as the cost function in a feedforward, adaptive, filtered-X LMS controller. The theory is described with reference to a 2-dimensional vibrating structure. Finally numerical results of real-time simulations are presented.
format	Conference or Workshop Item
author	Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke
author_facet	Md Nor, Khairul Affendy Mace, Brian R. Hioka, Yusuke
author_sort	Md Nor, Khairul Affendy
title	Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
title_short	Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
title_full	Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
title_fullStr	Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
title_full_unstemmed	Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
title_sort	adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes
publisher	International Institute of Acoustics and Vibration, IIAV
publishDate	2017
url	http://irep.iium.edu.my/72804/ http://irep.iium.edu.my/72804/ http://irep.iium.edu.my/72804/9/72804_Adaptive%20control%20of%20radiated%20sound%20power_complete.pdf http://irep.iium.edu.my/72804/1/72804_Adaptive%20control%20of%20radiated%20sound_SCOPUS.pdf
first_indexed	2023-09-18T21:43:12Z
last_indexed	2023-09-18T21:43:12Z
_version_	1777413277535436800

Adaptive control of radiated sound power based on time-domain estimates of acoustic radiation modes

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