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...
| Main Authors: | , , |
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| Format: | Proceeding Paper |
| Language: | English English |
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International Institute of Acoustics and Vibration, IIAV
2017
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| Online Access: | 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 |
| _version_ | 1848787682814066688 |
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| 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 |
| building | IIUM Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-14T17:28:49Z |
| format | Proceeding Paper |
| id | iium-72804 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T17:28:49Z |
| publishDate | 2017 |
| publisher | International Institute of Acoustics and Vibration, IIAV |
| recordtype | eprints |
| repository_type | Digital Repository |
| 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 Proceeding Paper 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/ |
| 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 |
| title | 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_short | 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 |
| topic | TA365 Acoustics in engineering. Acoustical engineering |
| 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 |