This paper presents a theoretical and experimental study of the frequency response function of a matched volume velocity sensor and uniform force actuator for active structural acoustic control. The paper first reviews the design of a volume velocity sensor and uniform force actuator on a panel, using piezoelectric film with quadratic shaping of the electrodes. The frequency response function of a matched volume velocity sensor and uniform force actuator bonded on either sides of a panel is then studied in detail. This analysis shows that below 100 Hz the sensor–actuator response is controlled by the bending vibration of the panel and a good estimate of the volumetric component of the transverse vibration of the panel is achieved. At higher frequencies, however, the sensor–actuator response is controlled by the in-plane longitudinal and shear vibration of the panel, which causes the real part of the frequency response function to be not strictly positive and to be characterized by large amplitudes at higher frequencies. These two phenomena are important since they limit the possibility of implementing a stable direct velocity feedback control system using these transducers.
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December 2001
December 01 2001
Analysis and measurement of a matched volume velocity sensor and uniform force actuator for active structural acoustic control
P. Gardonio;
P. Gardonio
Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, England
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Y.-S. Lee;
Y.-S. Lee
Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, England
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S. J. Elliott;
S. J. Elliott
Institute of Sound and Vibration Research, University of Southampton, Southampton SO17 1BJ, England
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S. Debost
S. Debost
Thomson Marconi Sonar, 525, Route des Dolines, BP 157-06903, Sophia Antipolis, Cedex, France
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J. Acoust. Soc. Am. 110, 3025–3031 (2001)
Article history
Accepted:
August 23 2001
Received:
December 08 2001
Citation
P. Gardonio, Y.-S. Lee, S. J. Elliott, S. Debost; Analysis and measurement of a matched volume velocity sensor and uniform force actuator for active structural acoustic control. J. Acoust. Soc. Am. 1 December 2001; 110 (6): 3025–3031. https://doi.org/10.1121/1.1412448
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