Abstract
This paper considers techniques to improve stability robustness and performance robustness of controllers in ducts and anechoic chambers. Aspects that are considered are the stability of transfer functions that are obtained from system identification, the size of the quiet zone, and reduction of controller complexity by limiting the number of control parameters. The methods that are considered in this paper are decentralized acoustic feedback to dampen resonances, directional sensors for a larger and predictable region of silence, current drive with velocity feedback, and distributed control. For loudspeakers a feedback structure is proposed which consists of two nested feedback loops. The methods are numerically evaluated for controlling reflections to realize anechoic properties in a duct and a full-size anechoic chamber.
Original language | English |
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Title of host publication | Proceedings of ISMA 2024 - International Conference on Noise and Vibration Engineering and USD 2024 - International Conference on Uncertainty in Structural Dynamics |
Editors | W. Desmet, B. Pluymers, D. Moens, J. del Fresno Zarza |
Publisher | Katholieke Universiteit Leuven |
Pages | 40-54 |
Number of pages | 15 |
ISBN (Electronic) | 9789082893175 |
Publication status | Published - 2024 |
Event | 31st International Conference on Noise and Vibration Engineering, ISMA 2024 and 10th International Conference on Uncertainty in Structural Dynamics, USD 2024 - Leuven, Belgium Duration: 9 Sept 2024 → 11 Sept 2024 Conference number: 31 |
Conference
Conference | 31st International Conference on Noise and Vibration Engineering, ISMA 2024 and 10th International Conference on Uncertainty in Structural Dynamics, USD 2024 |
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Abbreviated title | ISMA 2024 |
Country/Territory | Belgium |
City | Leuven |
Period | 9/09/24 → 11/09/24 |