周期音に対するフィードバック型ANCシステムの研究
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概要
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Active noise control approach has been well known as a powerful tool for machinery noise reduction and the practical applications such as duct systems for air-conditioner or silencers have become popular in recent years. Most of such applications adopt feedforward control based on LMS algorithm. Feedback control, on the contrary, has been less used, because it often causes the unstable oscillation called howling. The author has proposed the new approach of feedback control in which the phase of the loop transfer function is suitably adjusted so as to avoid the system instability. This paper describes the principle of the control method and the comparison between the theoretical estimations and experimental results.
- 福井工業大学の論文
- 2003-03-20