基于复Morlet小波的混合动力客车噪声识别与改进

doi:10.16578/j.issn.1004.2539.2013.07.041

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基于复Morlet小波的混合动力客车噪声识别与改进

更新时间：2025-04-03

- 基于复Morlet小波的混合动力客车噪声识别与改进
- Vol. 37, Issue 7, Pages: 88-90+93(2013)
- 作者机构：
  
  重庆工程职业技术学院2. 重庆大学机械传动国家重点实验室3. 湖南南车时代电动汽车股份有限公司技术中心
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2013.07.041
  CLC： U461
- Published：2013
- 稿件说明：
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[1]余烽,徐中明,周小林,贺岩松,谭建林.基于复Morlet小波的混合动力客车噪声识别与改进[J].机械传动,2013,37(07):88-90+93.

[J]. 2013, 37(7): 88-90+93.
[1]余烽,徐中明,周小林,贺岩松,谭建林.基于复Morlet小波的混合动力客车噪声识别与改进[J].机械传动,2013,37(07):88-90+93. DOI： 10.16578/j.issn.1004.2539.2013.07.041.

[J]. 2013, 37(7): 88-90+93. DOI： 10.16578/j.issn.1004.2539.2013.07.041.

摘要

针对某款混合动力客车在混合模式下

制动时出现的异常噪声问题

采用复Morlet小波对采集的噪声信号进行了时频分析

结合滤波分析和声音回放技术

确定了异常噪声时频信息

结果表明异常噪声与车速直接相关。提取了初始制动车速分别为39km/h、48km/h、56km/h时的异常噪声频率

与变速器副箱锥齿轮啮合频率一致

表明该车制动时出现的异常噪声是由变速器副箱锥齿轮发出的。针对该异常噪声

采取对锥齿轮副进行精心配对、并修形的改进措施

改进后异常噪声大幅减小

有效改善了该车的声学舒适性水平。

Abstract

With abnormal noise usually occurs when braking of a hybrid power bus in mixed mode

time-frequency analysis is performed by using complex Morlet wavelet for a collected noise signal.Combined with filtering analysis and sound playback technology

the time-frequency information of abnormal noise is determined

the results show that the abnormal noise and vehicle speed are directly related.Extracting the abnormal noise frequency from the conditions varying initial braking velocity:39 km/h

48 km/h

56 km/h is the same as the frequency of bevel gear.It shows that the abnormal noise during the vehicle braking comes from the bevel gear.For the abnormal noise sources

measures of bevel gear matching carefully and shape modification are taken.Real car Subjective test shows the abnormal noise is decreased greatly

and sound level is improved effectively.

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