摘要
The helicopter cabin noise generated by a rotating rotor is mainly characterized by discrete line-spectra in low frequency range and thus suitable for active control. In an active noise control system, the configuration of secondary sources plays a significant role for determining noise reduction. In this study, sound field reproduction methods are applied to optimize the configuration of secondary sources in a helicopter cabin using a finite element (FE) model, and to reduce the noise level at passengers’ ears. The least-absolute shrinkage and selection operator (Lasso) is used to select a reduced set of secondary sources for three harmonic frequencies, respectively. The selection of the sparsity-tuning parameter is discussed in detail under power and number constraint. The Tikhonov-regularized least squares (LS) problem is solved to smooth amplitudes of loudspeakers under power constraint.
源语言 | 英语 |
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出版状态 | 已出版 - 2017 |
活动 | 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 - Hong Kong, 中国 期限: 27 8月 2017 → 30 8月 2017 |
会议
会议 | 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet, INTER-NOISE 2017 |
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国家/地区 | 中国 |
市 | Hong Kong |
时期 | 27/08/17 → 30/08/17 |