Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel
Wind tunnels usually use long cantilever stings to support aerodynamic models in order to reduce support system flow interference on experimental data. However, such support systems are a potential source of vibration problems which limit the test envelope and affect data quality due to the inherent...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2014/524351 |
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| author | Jinjin Chen Xing Shen Fanfan Tu Ehtesham Mustafa Qureshi |
| author_facet | Jinjin Chen Xing Shen Fanfan Tu Ehtesham Mustafa Qureshi |
| author_sort | Jinjin Chen |
| collection | DOAJ |
| description | Wind tunnels usually use long cantilever stings to support aerodynamic models in order to reduce support system flow interference on experimental data. However, such support systems are a potential source of vibration problems which limit the test envelope and affect data quality due to the inherently low structural damping of the systems. When exposed to tunnel flow, turbulence and model flow separation excite resonant Eigenmodes of a sting structure causing large vibrations due to low damping. This paper details the development and experimental evaluation of an active damping system using piezoelectric devices with balance signal feedback both in a lab and a low speed acoustic wind tunnel and presents the control algorithm verification tests with a simple cantilever beam. It is shown that the active damper, controlled separately by both PID and BP neural network, has effectively attenuated the vibration. For sting mode only, 95% reduction of displacement response under exciter stimulation and 98% energy elimination of sting mode frequency have been achieved. |
| format | Article |
| id | doaj-art-88e22d728d8a4b8bbe901d9de03a8956 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-88e22d728d8a4b8bbe901d9de03a89562025-08-20T02:09:11ZengWileyShock and Vibration1070-96221875-92032014-01-01201410.1155/2014/524351524351Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind TunnelJinjin Chen0Xing Shen1Fanfan Tu2Ehtesham Mustafa Qureshi3State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaWind tunnels usually use long cantilever stings to support aerodynamic models in order to reduce support system flow interference on experimental data. However, such support systems are a potential source of vibration problems which limit the test envelope and affect data quality due to the inherently low structural damping of the systems. When exposed to tunnel flow, turbulence and model flow separation excite resonant Eigenmodes of a sting structure causing large vibrations due to low damping. This paper details the development and experimental evaluation of an active damping system using piezoelectric devices with balance signal feedback both in a lab and a low speed acoustic wind tunnel and presents the control algorithm verification tests with a simple cantilever beam. It is shown that the active damper, controlled separately by both PID and BP neural network, has effectively attenuated the vibration. For sting mode only, 95% reduction of displacement response under exciter stimulation and 98% energy elimination of sting mode frequency have been achieved.http://dx.doi.org/10.1155/2014/524351 |
| spellingShingle | Jinjin Chen Xing Shen Fanfan Tu Ehtesham Mustafa Qureshi Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel Shock and Vibration |
| title | Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel |
| title_full | Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel |
| title_fullStr | Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel |
| title_full_unstemmed | Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel |
| title_short | Experimental Research on an Active Sting Damper in a Low Speed Acoustic Wind Tunnel |
| title_sort | experimental research on an active sting damper in a low speed acoustic wind tunnel |
| url | http://dx.doi.org/10.1155/2014/524351 |
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