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Localization of wind turbine noise using a compact microphone array with advanced beamforming algorithms

机译:使用具有先进波束形成算法的紧凑型麦克风阵列来定位风力涡轮机噪声

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摘要

The knowledge of noise source location on a wind turbine is crucial for designing low noise wind turbines. Even though there has been considerable effort to theoretically predict the noise from wind turbines in the past, very few experimental investigations have been performed to validate these models. Currently, compliance standards for wind turbine noise are based on single microphone measurements at various designated locations around a wind turbine. This only provides amplitude and frequency data of the overall wind turbine noise. However, it is impossible to locate noise sources, and to understand the dominant noise generation mechanism, using single microphone measurements. A sophisticated method, namely, the use of a microphone phased array with beamforming is necessary to locate the noise sources. Even though microphone arrays have been widely used to study aircraft flyover and jet noise, it has just recently found application in locating wind turbine noise. Typical microphone arrays that have been used in the past for monitoring aircraft noise and wind turbine noise are very large ranging up to 270 m2 in area with about 148 microphones. The setup is fixed for a particular wind turbine and takes a considerable amount of time. In this thesis it is shown that a compact microphone array (with 24 microphones spread over 1.5 m2) is sufficient to locate and separate wind turbine noise sources successfully. It is also shown that in order to use a compact microphone array, advanced deconvolution based beamforming methods such as DAMAS, CLEAN-SC, LP, and TIDY are necessary.
机译:风力涡轮机上噪声源位置的知识对于设计低噪声风力涡轮机至关重要。尽管过去在理论上已经做出了巨大的努力来预测来自风力涡轮机的噪声,但很少进行实验研究来验证这些模型。当前,风力涡轮机噪声的合规性标准基于风力涡轮机周围各个指定位置的单个麦克风测量。这仅提供了整个风力涡轮机噪声的幅度和频率数据。但是,无法使用单个麦克风测量来定位噪声源并了解主要的噪声生成机制。需要一种复杂的方法,即使用带有波束成形的麦克风相控阵来定位噪声源。尽管麦克风阵列已被广泛用于研究飞机的飞越和喷气噪声,但它最近才在定位风力涡轮机噪声中得到应用。过去用于监视飞机噪声和风力涡轮机噪声的典型麦克风阵列非常大,面积约为270 m2,带有约148个麦克风。该设置对于特定的风力涡轮机是固定的,并且花费大量时间。本文表明,紧凑的麦克风阵列(24个麦克风分布在1.5 m2上)足以成功定位和分离风力涡轮机的噪声源。还表明,为了使用紧凑的麦克风阵列,必须使用基于高级反卷积的波束成形方法,例如DAMAS,CLEAN-SC,LP和TIDY。

著录项

  • 作者单位

    Illinois Institute of Technology.;

  • 授予单位 Illinois Institute of Technology.;
  • 学科 Mechanical engineering.;Aerospace engineering.;Environmental engineering.
  • 学位 Ph.D.
  • 年度 2014
  • 页码 214 p.
  • 总页数 214
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:53:46

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