Time-domain analysis of active control of sound transmission through an elastic plate backed by a rigid rectangular cavity

Shozo Koshigoe; Graham K. Ellis

doi:10.1117/12.174225

1 May 1994 Time-domain analysis of active control of sound transmission through an elastic plate backed by a rigid rectangular cavity

Shozo Koshigoe, Graham K. Ellis

Author Affiliations +

Proceedings Volume 2192, Smart Structures and Materials 1994: Mathematics and Control in Smart Structures; (1994) https://doi.org/10.1117/12.174225
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

A time domain model for simulating the noise transmission through an elastic plate into a rigid cavity has been developed. This model is used to study the noise attenuation capability and transient-convergence of the filtered-x LMS feedforward control algorithm. Piezoelectric transducers (PZTs) are considered to be bonded on the elastic plate and are used as actuators in the control scheme. In this study, the fully coupled acoustic-plate interaction equations are solved using time dependent Green's function techniques, where a time varying air mean density is considered. The effects that the time varying mean density has on the transmission of sound and on the stability of the filtered-x LMS adaptive controller are discussed.

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Shozo Koshigoe and Graham K. Ellis "Time-domain analysis of active control of sound transmission through an elastic plate backed by a rigid rectangular cavity", Proc. SPIE 2192, Smart Structures and Materials 1994: Mathematics and Control in Smart Structures, (1 May 1994); https://doi.org/10.1117/12.174225

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