Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6954520 | Mechanical Systems and Signal Processing | 2018 | 14 Pages |
Abstract
This work proposes a virtual microphone methodology which enables full field acoustic measurements for vibro-acoustic systems. The methodology employs a Kalman filtering framework in order to combine a reduced high-fidelity vibro-acoustic model with a structural excitation measurement and small set of real microphone measurements on the system under investigation. By employing model order reduction techniques, a high order finite element model can be converted in a much smaller model which preserves the desired accuracy and maintains the main physical properties of the original model. Due to the low order of the reduced-order model, it can be effectively employed in a Kalman filter. The proposed methodology is validated experimentally on a strongly coupled vibro-acoustic system. The virtual sensor vastly improves the accuracy with respect to regular forward simulation. The virtual sensor also allows to recreate the full sound field of the system, which is very difficult/impossible to do through classical measurements.
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
A. van de Walle, F. Naets, W. Desmet,