Active control of mid-frequency noise in a vibroacoustic cavity using an inertial piezoelectric actuator

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-09-18 DOI:10.1016/j.apacoust.2025.111062

Junseok Choi , Changik Lee , Sang-Kwon Lee, Howuk Kim

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引用次数: 0

Abstract

Application of conventional active noise control (ANC) to the mid-frequency band (>200 Hz) in vibroacoustic cavities has been technically restricted owing to the complex acoustic field generated by the use of multiple output speakers. However, as noise control in such frequency bands is essential for modern electric vehicles, this study proposes and demonstrates a novel method for ANC in a vibroacoustic cavity using an inertial vibration actuator. To this end, a prototype actuator is designed using a finite element analysis, and it exhibits a dynamic force of ∼11.3 mN/V_p-p in the usable frequency band (450–750 Hz). An ANC controller for the prototype actuator was implemented on a real-time digital signal processor using a filtered-x least mean squares (FxLMS) algorithm. The ANC system performance is evaluated in a 700 mm × 650 mm × 450 mm rectangular vibroacoustic cavity with a vibrating surface on one side. The proposed ANC system successfully suppresses multiple harmonics associated with the acoustic cavity modes by up to 12 dB at predominant peaks. Moreover, the system operates stably under a wideband (300 Hz) frequency sweep using a single inertial actuator optimally positioned on the structure. The study results indicate that the proposed ANC method shows considerable promise as a replacement for conventional speaker-assisted methods for ANC in vibroacoustic cavities.

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用惯性压电作动器主动控制振动声腔中频噪声

由于使用多个输出扬声器产生的复杂声场，传统的主动噪声控制（ANC）在振动声腔中频带（> 200hz）的应用在技术上受到了限制。然而，由于这些频段的噪声控制对现代电动汽车至关重要，本研究提出并演示了一种使用惯性振动执行器在振动声腔中进行ANC的新方法。为此，利用有限元分析设计了原型驱动器，在可用频段（450-750 Hz）内，其动态力为~ 11.3 mN/Vp-p。采用滤波-x最小均方（FxLMS）算法，在实时数字信号处理器上实现了原型执行器的ANC控制器。在一侧有振动表面的700 mm × 650 mm × 450 mm矩形振动声腔中对ANC系统的性能进行了评估。所提出的ANC系统成功地抑制了与声腔模式相关的多个谐波，在主峰处可达12 dB。此外，该系统在宽带（300 Hz）扫频下稳定运行，使用最佳定位在结构上的单个惯性致动器。研究结果表明，所提出的ANC方法作为传统的扬声器辅助方法在振动声腔中进行ANC的替代方法具有相当大的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.