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首页> 外文期刊>Mechanical systems and signal processing >NEX-LMS: A novel adaptive control scheme for harmonic sound quality control
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NEX-LMS: A novel adaptive control scheme for harmonic sound quality control

机译：NEX-LMS：一种用于谐波音质控制的新型自适应控制方案

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摘要

This paper presents a novel adaptive control scheme, with improved convergence rate, for the equalization of harmonic disturbances such as engine noise. First, modifications for improving convergence speed of the standard filtered-X LMS control are described. Equalization capabilities are then implemented, allowing the independent tuning of harmonics. Eventually, by providing the desired order vs. engine speed profiles, the pursued sound quality attributes can be achieved. The proposed control scheme is first demonstrated with a simple secondary path model and, then, experimentally validated with the aid of a vehicle mockup which is excited with engine noise. The engine excitation is provided by a real-time sound quality equivalent engine simulator. Stationary and transient engine excitations are used to assess the control performance. The results reveal that the proposed controller is capable of large order-level reductions (up to 30 dB) for stationary excitation, which allows a comfortable margin for equalization. The same holds for slow run-ups (>15s) thanks to the improved convergence rate. This margin, however, gets narrower with shorter run-ups ( ≤ 10s).
机译：本文提出了一种具有更高收敛速度的新颖自适应控制方案，用于均衡谐波干扰，例如发动机噪声。首先，描述了用于提高标准的滤波X LMS控制的收敛速度的修改。然后实现均衡功能，从而可以独立调整谐波。最终，通过提供所需的阶次与发动机速度曲线，可以实现所追求的声音质量属性。首先通过简单的辅助路径模型演示了提出的控制方案，然后借助车辆模型对实验结果进行了验证，该模型由发动机噪声激发。等效于实时声音质量的引擎模拟器可提供引擎激励。固定和瞬态发动机励磁用于评估控制性能。结果表明，所提出的控制器能够针对稳态激励进行大幅度的阶跃降低（最高30 dB），从而为均衡提供了舒适的余量。由于提高了收敛速度，因此对于慢速启动（> 15s）也是如此。但是，随着启动时间的缩短（≤10s），该裕度会变窄。

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  • 来源
    《Mechanical systems and signal processing》 |2010年第6期|P.1727-1738|共12页
  • 作者

    Leopoldo P.R. de Oliveira; Bert Stallaert; Karl Janssens; Herman Van der Auweraer; Paul Sas; Wim Desmet;

  • 作者单位

    Department of Mechanical Engineering - EESC, University of Sao Paulo, Av. Trabalhador Sancarlense, 400, Sao Carlos, SAP 13566-590, Brazil;

    Department of Mechanical Engineering - PMA, Katholieke Universiteit Leuven, Celestijnenlaan 300 B, B-3001 Leuven, Belgium;

    LMS International NV, Interleuvenlaan 68, B-3001 Leuven, Belgium;

    LMS International NV, Interleuvenlaan 68, B-3001 Leuven, Belgium;

    Department of Mechanical Engineering - PMA, Katholieke Universiteit Leuven, Celestijnenlaan 300 B, B-3001 Leuven, Belgium;

    Department of Mechanical Engineering - PMA, Katholieke Universiteit Leuven, Celestijnenlaan 300 B, B-3001 Leuven, Belgium;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    sound quality; active control; engine noise; filtered x-LMS; NEX-LMS;

    机译：音质主动控制;发动机噪音;过滤的x-LMS;NEX-LMS;

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