Localisation of Automobile Door Rattle Noise Based on the Time Reversal Method

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2023-08-05 DOI:10.1007/s40857-023-00301-z

Weidong Zhao, Nan Zhang, Li’an Tian

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Abstract

Abnormal noise is a key factor affecting automobile ride comfort, and the localisation of abnormal noise sources is critical for noise control. Herein, a mathematical model is proposed for the localisation of automobile door rattle sources based on Lamb wave propagation theory, Morlet wavelet transform, and the principle of time-reversal focus positioning. The cause of vibration signal wave packet aliasing was explored through thin plate impact simulation, and narrow-band signal extraction was then determined. The influence of the initial generation time \({T}_{0}\) of the rattle signal on the positioning imaging was obtained through a rattle noise source localisation test, and the signal imaging discrimination method at time \({T}_{0}\) was proposed. Verification test results showed that the maximum positioning error of the automobile door rattle noise source was no greater than 3.2 cm, and the average positioning error was 2.01 cm, which confirmed the feasibility of the proposed method for locating the rattle noise source in the automobile door.

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基于时间反转方法的汽车门摇噪声定位

异常噪声是影响汽车平顺性的关键因素，异常噪声源的定位是控制汽车噪声的关键。在此基础上，基于Lamb波传播理论、Morlet小波变换和时间反转焦点定位原理，提出了车门颤振源定位的数学模型。通过薄板冲击仿真，探讨振动信号波包混叠的原因，确定窄带信号提取方法。通过响浪声噪声源定位试验，得到了响浪声信号初始产生时间\({T}_{0}\)对定位成像的影响，并提出了\({T}_{0}\)时刻的信号成像辨别方法。验证试验结果表明，车门摇响器噪声源的最大定位误差不大于3.2 cm，平均定位误差为2.01 cm，验证了所提方法定位车门摇响器噪声源的可行性。

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来源期刊

Acoustics Australia ACOUSTICS-

自引率

5.90%

发文量

期刊介绍： Acoustics Australia, the journal of the Australian Acoustical Society, has been publishing high quality research and technical papers in all areas of acoustics since commencement in 1972. The target audience for the journal includes both researchers and practitioners. It aims to publish papers and technical notes that are relevant to current acoustics and of interest to members of the Society. These include but are not limited to: Architectural and Building Acoustics, Environmental Noise, Underwater Acoustics, Engineering Noise and Vibration Control, Occupational Noise Management, Hearing, Musical Acoustics.