Title: A robust hybrid active noise control system using IIR notch filters

Authors: Yegui Xiao; Kazunari Doi

Addresses: Department of Management and Information Systems, Prefectural University of Hiroshima, Hiroshima 734-8558, Japan ' Department of Management and Information Systems, Prefectural University of Hiroshima, Hiroshima 734-8558, Japan

Abstract: Noise signals generated by rotating machines usually contain both wideband and sinusoidal components. The conventional broadband active noise control (BANC) is generally effective for reducing such noise signals, but its performance may degenerate significantly when the frequencies of the sinusoids are very small. The narrowband ANC (NANC) is good at dealing with the sinusoidal component, but it is powerless with the wideband noise. A hybrid ANC (HANC) has been proposed recently to suppress both components simultaneously. However, it is vulnerable in the presence of sensor error. In this paper, we propose a new structure for the HANC that presents very nice robustness to sensor error. The proposed HANC uses a bandpass filter bank whose elements are derived from IIR notch filters with constrained poles and zeros, and is capable of mitigating the frequency mismatch (FM) due to the non-acoustical sensor fatigue, aging, etc. Extensive simulations are provided to prove the performance advantages of the proposed system.

Keywords: active noise control; ANC; broadband ANC; BANC; narrowband ANC; NANC; hybrid ANC; HANC; robust control; frequency mismatch; IIR notch filters; rotating machinery; sensor error; bandpass filter bank; simulation.

DOI: 10.1504/IJAMECHS.2013.055228

International Journal of Advanced Mechatronic Systems, 2013 Vol.5 No.1, pp.69 - 77

Available online: 23 Jul 2013 *

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