標題: Development of a zero spillover controller for broadband cancellation of noise in ducts
作者: Wu, JD
Bai, MR
機械工程學系
Department of Mechanical Engineering
關鍵字: acoustics;active noise control;digital signal processing;spatially feedforward control
公開日期: 1-Nov-2001
摘要: In this paper, an active noise control (ANC) system for broadband cancellation of noise in ducts. where a nonacoustical reference is unavailable and thus the ANC structure is "spatially feedforward" is presented. In this structure, acoustic feedback that is known to be detrimental to system stability and performance must be taken into account in controller design. in this case, difficulties generally arise in implementing the ideal controller. or the zero spillover controller due to plant uncertainties. In the present study, an equivalent approach based on the 2-norm (H-2) optimal model matching principle is proposed in controller design. The control algorithm is implemented on a digital signal processor (DSP). by finite impulse response (FIR), infinite impulse response (IIR) and hybrid filters. The experimental results indicate that the proposed controller was effective in suppressing periodic noise and random noise sources. without and with airflow.
URI: http://hdl.handle.net/11536/29322
ISSN: 0021-4922
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 40
Issue: 11
起始頁: 6634
結束頁: 6640
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