A new feedback ANC system approach

Davari, Pooya & Hassanpour, Hamid (2009) A new feedback ANC system approach. In 13th International CSI Computer Conference (CSICC 2008), 9-11 March 2008, Kish Island, Iran.

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We propose a new active noise control (ANC) technique. The technique has a feedback structure to have a simple configuration in practical implementation. In this approach, the secondary path is modelled online to ensure convergence of the system as the secondary paths are practically time varying or non-linear. The proposed method consists of two steps: a noise controller which is based on a modified FxLMS algorithm, and a new variable step size (VSS) LMS algorithm which is used to adapt the modelling filter with the secondary path. The proposed algorithm stops injection of the white noise at the optimum point and reactivate the injection during the operation, if needed, to maintain performance of the system. Eliminating continuous injection of the white noise increases the performance of the proposed method significantly and makes it more desirable for practical ANC systems. The computer simulations are presented to show the effectiveness of the proposed method.

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1 citations in Scopus
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ID Code: 59576
Item Type: Conference Paper
Refereed: Yes
Additional Information: Conference paper published in "Advances in Computer Science and Engineering Communications in Computer and Information Science"
Keywords: Active noise control, Adaptive filter, FxLMS, Feedback, Secondary path
DOI: 10.1007/978-3-540-89985-3_40
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 03 May 2013 03:09
Last Modified: 24 Jul 2013 03:14

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