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Title: Improving robustness of active noise control in ducts
Authors: Yuan, J 
Issue Date: 2003
Publisher: Acoustical Society of America
Source: Journal of the Acoustical Society of America, 2003, v. 114, no. 1, p. 210-217 How to cite?
Journal: Journal of the Acoustical Society of America 
Abstract: A robust active noise controller (ANC) is proposed here for finite ducts. While the H∝ control theory provides theoretical ground and numerical algorithms to design robust controllers, it is important for an engineer to design and formulate a robust controller so that the objective is more achievable and the H∞ constraints less restrictive without sacrificing robustness. A new robust ANC is designed this way with an extra actuator to improve achievable performance and introduce more degrees of freedom to controller parameters. The new strategy relaxes H∞ constraints without sacrificing robustness and enables the ANC to tolerate a wide variety of errors and uncertainties including truncation errors between a finite model and an infinite field. Theoretical analysis, numerical examples, and experimental results are presented to demonstrate the improved performance of the proposed ANC when subject to a certain level of uncertainties in a duct.
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.1579005
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