Reduction of turbulent boundary layer induced interior noise through active impedance control
The use of a single actuator tuned to an optimum impedance to control the sound power radiated from a turbulent boundary layer (TBL) excited aircraft panel into the aircraft interior is examined. An approach to calculating the optimum impedance is defined and the limitations on the reduction in radi...
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| Veröffentlicht in: | The Journal of the Acoustical Society of America 2008-03, Vol.123 (3), p.1427-1438 |
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| container_end_page | 1438 |
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| container_issue | 3 |
| container_start_page | 1427 |
| container_title | The Journal of the Acoustical Society of America |
| container_volume | 123 |
| creator | Remington, Paul J. Curtis, Alan R. D. Coleman, Ronald B. Knight, J. Scott |
| description | The use of a single actuator tuned to an optimum impedance to control the sound power radiated from a turbulent boundary layer (TBL) excited aircraft panel into the aircraft interior is examined. An approach to calculating the optimum impedance is defined and the limitations on the reduction in radiated power by a single actuator tuned to that impedance are examined. It is shown that there are too many degrees of freedom in the TBL and in the radiation modes of the panel to allow a single actuator to control the radiated power. However, if the panel modes are lightly damped and well separated in frequency, significant reductions are possible. The implementation of a controller that presents a desired impedance to a structure is demonstrated in a laboratory experiment, in which the structure is a mass. The performance of such a controller on an aircraft panel is shown to be effective, if the actuator impedance is similar to but not the same as the desired impedance, provided the panel resonances are well separated in frequency and lightly damped. |
| doi_str_mv | 10.1121/1.2835608 |
| format | Article |
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The implementation of a controller that presents a desired impedance to a structure is demonstrated in a laboratory experiment, in which the structure is a mass. The performance of such a controller on an aircraft panel is shown to be effective, if the actuator impedance is similar to but not the same as the desired impedance, provided the panel resonances are well separated in frequency and lightly damped.</description><subject>Acoustics</subject><subject>Aviation</subject><subject>Electric Impedance</subject><subject>Exact sciences and technology</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Humans</subject><subject>Models, Theoretical</subject><subject>Noise</subject><subject>Noise: its effects and control</subject><subject>Physics</subject><subject>Radiation</subject><issn>0001-4966</issn><issn>1520-8524</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kE1LAzEQhoMotlYP_gHJxYOHrfnY7CYXQYpfUBBEj7Jk82Ej201JskL_vSld6snTzMDDzLwPAJcYzTEm-BbPCaesQvwITDEjqOCMlMdgihDCRSmqagLOYvzOI-NUnIIJ5rTMLZmCzzejB5Wc76G3MA2hHTrTJ9j6odcybGEntyZA12fK6FyTCc4H2HsXDUyr4IevFZR5w4-Bbr0xWvbKQOX7FHx3Dk6s7KK5GOsMfDw-vC-ei-Xr08viflkoWvFU0FqrVlgqrCZCamUptlIIUlkuqrrmvK4YY0RZzHKy1hgtdImtMYxRW2NCZ-Bmv1cFH2MwttkEt87vNxg1O0UNbkZFmb3as5uhXRv9R45OMnA9AjIq2dmQE7l44AjCggjOMne356JySe4U_n_1YLnxthkt018tsYUO</recordid><startdate>20080301</startdate><enddate>20080301</enddate><creator>Remington, Paul J.</creator><creator>Curtis, Alan R. 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It is shown that there are too many degrees of freedom in the TBL and in the radiation modes of the panel to allow a single actuator to control the radiated power. However, if the panel modes are lightly damped and well separated in frequency, significant reductions are possible. The implementation of a controller that presents a desired impedance to a structure is demonstrated in a laboratory experiment, in which the structure is a mass. The performance of such a controller on an aircraft panel is shown to be effective, if the actuator impedance is similar to but not the same as the desired impedance, provided the panel resonances are well separated in frequency and lightly damped.</abstract><cop>Woodbury, NY</cop><pub>Acoustical Society of America</pub><pmid>18345832</pmid><doi>10.1121/1.2835608</doi><tpages>12</tpages></addata></record> |
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| identifier | ISSN: 0001-4966 |
| ispartof | The Journal of the Acoustical Society of America, 2008-03, Vol.123 (3), p.1427-1438 |
| issn | 0001-4966 1520-8524 |
| language | eng |
| recordid | cdi_crossref_primary_10_1121_1_2835608 |
| source | MEDLINE; AIP Journals Complete; Acoustical Society of America (AIP); Alma/SFX Local Collection |
| subjects | Acoustics Aviation Electric Impedance Exact sciences and technology Fundamental areas of phenomenology (including applications) Humans Models, Theoretical Noise Noise: its effects and control Physics Radiation |
| title | Reduction of turbulent boundary layer induced interior noise through active impedance control |
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