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Active control of structural acoustic pressure in a rectangular cavity using piezoelectric actuators

โœ Scribed by Qirong Lin; Zhengxing Liu; Qing Wang

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
371 KB
Volume
20
Category
Article
ISSN
0997-7538

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โœฆ Synopsis

Active control of structural acoustic pressure in a rectangular cavity with a flexible beam is simulated numerically. The wave equation of the acoustic pressure and the equation of motion of the beam are approximated via the series expansions, and is then expressed in state space form. The control of structural acoustic pressure and vibration of the beam was implemented by applying the optimal voltage on piezoelectric actuators through an LQR controller. Two cases of different external forces acting on the piezoelectric laminated beam are illustrated. Results demonstrate that such a control system can efficiently reduce the structural acoustic pressure.

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