A new analytical model is developed for the reduction of noise inside a cavity using distributed piezoelectric actuators. A modal coupling method is used to establish the governing equations of motion of the fully coupled acoustics-structure-piezoelectric patch system. Two performance functions relating “global” and “local” optimal control of sound pressure levels (SPL) respectively are applied to obtain the control laws. The discussions on associated control mechanism show that both the mechanisms of modal amplitude suppression and modal rearrangement may sometimes coexist in the implementation of optimal noise control.
Reduction of Noise Inside a Cavity by Piezoelectric Actuators
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received November 2000; Revised September 2002. Associate Editor: R. Ohayon.
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Hagiwara, I., Wang , D. W., Shi , Q. Z., and Rao, R. S. (January 6, 2003). "Reduction of Noise Inside a Cavity by Piezoelectric Actuators ." ASME. J. Vib. Acoust. January 2003; 125(1): 12–17. https://doi.org/10.1115/1.1526513
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