Active control of interior noise in a rectangular cavity with two flexible panels

Mohamed Gharib, Mohammad Tawfik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, a numerical effort is presented for modeling and control of structure-acoustics coupled systems. Modeling of sound transmission through a panel-cavity-panel system is presented. An approximate series solution is assumed and the solution is obtained using Galarkin's method. The system to be modeled is consisting of a rectangular cavity with two flexible panels, one at the top of the cavity while the other at the bottom and four other fixed boundaries. PZT pair patches are considered to be bonded to the top panel and each pair is assumed to produce a pure moment actuation when an electric drive signal is used to excite them. The flexible panel is exposed to an external pressure excitation due to a planar wave generated by a sound source mounted above the cavity. Displacements at the mid points are calculated for the upper and lower panels. The developed model is controlled using the optimal LQR control law. The numerically obtained time responses from the compensated model are found to be acceptable compared to the uncompensated ones. It is found that the actuation of the upper panel can decrease the vibration of the lower one rather than decreasing the acoustic pressure inside the cavity.

Original languageEnglish
Title of host publication14th International Congress on Sound and Vibration 2007, ICSV 2007
Pages1567-1574
Number of pages8
Volume2
Publication statusPublished - 2007
Externally publishedYes
Event14th International Congress on Sound and Vibration 2007, ICSV 2007 - Cairns, QLD, Australia
Duration: 9 Jul 200712 Jul 2007

Other

Other14th International Congress on Sound and Vibration 2007, ICSV 2007
CountryAustralia
CityCairns, QLD
Period9/7/0712/7/07

    Fingerprint

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Gharib, M., & Tawfik, M. (2007). Active control of interior noise in a rectangular cavity with two flexible panels. In 14th International Congress on Sound and Vibration 2007, ICSV 2007 (Vol. 2, pp. 1567-1574)