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|Type:||Artigo de evento|
|Title:||Comparing A Filtered-x Lms And An H2 Controller For The Attenuation Of The Sound Radiated By A Panel|
|Abstract:||This work investigates the performance of two control strategies used for structural acoustic isolation, where the emphasis is on controlling structural vibration that is responsible for sound radiation. The controllers are required to attenuate the sound pressure that is transmitted trough a plate under structural vibration. The proposed setup consists of a lexan plate clamped on a rigid baffie. The exogenous disturbance that causes the vibration of the plate is provided by a point force driven by a shaker. The control input used to attenuate the sound pressure inside a semi-anechoic room is provided by a fiexural moment driven by a piezoelectric patch attached to the plate. The first control strategy is a normalized Filtered-X LMS algorithm that assumes full information of the exogenous disturbance as reference. For the second strategy, a standard H2 optimal discrete-time feedback controller is designed. As opposed to the feedforward LMS design, the H2 feedback controller posses no information of the disturbance. The sound pressure is measured by two microphones. The first microphone, located near the plate, provides the error sensor for both controllers. The second microphone, located far from the plate is used for performance evaluation. Computer simulations are carried out to compare the performance of both designs. A real-time implementation of the H2 controller on a dSPACE board is developed and experimental results are presented. © (2006) by the Katholieke Universiteit Leuven Department of Mechanical Engineering All rights reserved.|
|Editor:||Katholieke Universiteit Leuven|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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