Article(id=1227591810843869675, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227591806980915649, articleNumber=null, orderNo=null, doi=10.16385/j.cnki.issn.1004-4523.202309049, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1694707200000, receivedDateStr=2023-09-15, revisedDate=1704211200000, revisedDateStr=2024-01-03, acceptedDate=null, acceptedDateStr=null, onlineDate=1770610295258, onlineDateStr=2026-02-09, pubDate=1757433600000, pubDateStr=2025-09-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770610295258, onlineIssueDateStr=2026-02-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770610295258, creator=13701087609, updateTime=1770610295258, updator=13701087609, issue=Issue{id=1227591806980915649, tenantId=1146029695717560320, journalId=1225147924628267009, year='2025', volume='38', issue='9', pageStart='1935', pageEnd='2204', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1770610294337, creator=13701087609, updateTime=1770610356968, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1227592069754057532, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227591806980915649, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1227592069754057533, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227591806980915649, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2123, endPage=2129, ext={EN=ArticleExt(id=1227591811548512757, articleId=1227591810843869675, tenantId=1146029695717560320, journalId=1225147924628267009, language=EN, title=Vibration data set of main shaft bearing of aero engine with wide speed range, columnId=null, journalTitle=Journal of Vibration Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Bearing fault diagnosis is an important research topic in aviation engine prediction and health management. Signal processing algorithms and deep learning models in this field rely on datasets. However, publicly available datasets generally cover narrow speed ranges, large speed intervals, single loads, and a lack of composite fault data, making it difficult to support the practical development of fault diagnosis methods. This article discloses a vibration dataset of aircraft main shaft bearings with a wide speed range. In addition to providing single fault data, this dataset also provides multiple composite bearing fault data, covering multi-channel bearing vibration signals with a wide speed range under different loads. The dataset well supports the research of classic fault diagnosis algorithms, and due to the large speed range covered by the data and high-speed sampling rate, it is more conducive to training deep learning fault diagnosis models.

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轴承故障诊断是航空发动机预测与健康管理的重要研究内容,该领域的信号处理算法和深度学习模型都依赖于数据集,然而已公开的数据集通常覆盖的转速范围窄、转速间隔大、载荷单一,且缺少复合故障数据,难以支撑故障诊断方法向实用化发展。本文公开了一个宽转速范围的航发主轴轴承振动数据集,该数据集除提供单一故障数据外,也提供了多种轴承复合故障数据,覆盖了不同载荷下宽转速范围的多通道轴承振动信号。数据集很好地支撑了经典故障诊断算法的研究,同时由于数据覆盖的转速范围宽、转速采样率高,因此更有利于训练基于深度学习的故障诊断模型。

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张伟涛(1983—),男,博士,教授。E-mail:
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Fault diagnosis method of aero engine main shaft rolling bearings in wide rotating speed range[J]. Journal of Vibration and Shock, 2023, 42(5): 253-262., articleTitle=Fault diagnosis method of aero engine main shaft rolling bearings in wide rotating speed range, refAbstract=null)], funds=[Fund(id=1227653073078780628, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, awardId=62471367, language=CN, fundingSource=国家自然科学基金资助项目(62471367), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1227653064119746730, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, xref=1., ext=[AuthorCompanyExt(id=1227653064128135340, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, companyId=1227653064119746730, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.School of Information Mechanics and Sensing Engineering, Xidian University, Xi’an 710071, China), AuthorCompanyExt(id=1227653064270741686, 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caption=Accuracy of fault classification under different rotational speed, figureFileSmall=zXdfY3PrtMiLDvQwuZOBkQ==, figureFileBig=5kh1Z/WmItNrKtkIJpa2Gg==, tableContent=null), ArticleFig(id=1227653071531082336, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=CN, label=图9, caption=不同转速下的故障分类正确率, figureFileSmall=zXdfY3PrtMiLDvQwuZOBkQ==, figureFileBig=5kh1Z/WmItNrKtkIJpa2Gg==, tableContent=null), ArticleFig(id=1227653071673688688, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=EN, label=Tab. 1, caption=

Size and parameters of bearing

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内径/mm外径/mm宽度/mm球数球径/mm节径/mm接触角/(°)
144.6188.0331724.616629.5
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轴承尺寸及参数

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内径/mm外径/mm宽度/mm球数球径/mm节径/mm接触角/(°)
144.6188.0331724.616629.5
), ArticleFig(id=1227653071946318466, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=EN, label=Tab. 2, caption=

Storage structure of data of single fault for bearings and its meaning

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含义
Num_of_sample_points样本点数目
Channel通道,共8个通道:channel1~channel8,分别对应加速度传感器AC0~AC7采集的数据
Load载荷,包含“Low”和“High”两个元素,分别表示低载荷和高载荷
Rotate_speed转速,范围为1000~10000 r/min,以200 r/min为间隔依次递增,共46个转速值
Data4维张量,用于获取振动信号采样值
), ArticleFig(id=1227653072051176074, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=CN, label=表2, caption=

轴承单一故障数据存储结构及其含义

, figureFileSmall=null, figureFileBig=null, tableContent=
含义
Num_of_sample_points样本点数目
Channel通道,共8个通道:channel1~channel8,分别对应加速度传感器AC0~AC7采集的数据
Load载荷,包含“Low”和“High”两个元素,分别表示低载荷和高载荷
Rotate_speed转速,范围为1000~10000 r/min,以200 r/min为间隔依次递增,共46个转速值
Data4维张量,用于获取振动信号采样值
), ArticleFig(id=1227653072214753940, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=EN, label=Tab. 3, caption=

Corresponding relationship of index m and rotational speed v

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mv/(r·min−1)
11000
21200
4610000
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索引m与转速v的对应关系

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mv/(r·min−1)
11000
21200
4610000
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Composite fault data of bearing

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有干扰无干扰
载荷1:4 kN载荷2:6 kN载荷1:4 kN载荷2:6 kN
内圈-外圈复合故障数据AC_1000_00_12_interfer0AC_1000_02_12_interfer0AC_1000_00_12AC_1000_02_12
AC_3000_00_12_interfer0AC_3000_02_12_interfer0AC_3000_00_12AC_3000_02_12
AC_5000_00_12_interfer0AC_5000_02_12_interfer0AC_5000_00_12AC_5000_02_12
内圈-外圈-滚珠复合故障数据AC_1000_00_123_interfer0AC_1000_02_123_interfer0AC_1000_00_123AC_1000_02_123
AC_3000_00_123_interfer0AC_3000_02_123_interfer0AC_3000_00_123AC_3000_02_123
AC_5000_00_123_interfer0AC_5000_02_123_interfer0AC_5000_00_123AC_5000_02_123
), ArticleFig(id=1227653072617407151, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=CN, label=表4, caption=

轴承复合故障数据

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有干扰无干扰
载荷1:4 kN载荷2:6 kN载荷1:4 kN载荷2:6 kN
内圈-外圈复合故障数据AC_1000_00_12_interfer0AC_1000_02_12_interfer0AC_1000_00_12AC_1000_02_12
AC_3000_00_12_interfer0AC_3000_02_12_interfer0AC_3000_00_12AC_3000_02_12
AC_5000_00_12_interfer0AC_5000_02_12_interfer0AC_5000_00_12AC_5000_02_12
内圈-外圈-滚珠复合故障数据AC_1000_00_123_interfer0AC_1000_02_123_interfer0AC_1000_00_123AC_1000_02_123
AC_3000_00_123_interfer0AC_3000_02_123_interfer0AC_3000_00_123AC_3000_02_123
AC_5000_00_123_interfer0AC_5000_02_123_interfer0AC_5000_00_123AC_5000_02_123
), ArticleFig(id=1227653072730653367, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591810843869675, language=EN, label=Tab. 5, caption=

Corresponding relationship of load coding and actual load

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载荷编码轴向载荷/kN转速范围/(r·min−1载荷分类
004.01000~5000Low
026.0
107.05000~10000High
129.0
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载荷编码与实际载荷的对应关系

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载荷编码轴向载荷/kN转速范围/(r·min−1载荷分类
004.01000~5000Low
026.0
107.05000~10000High
129.0
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宽转速范围航发主轴轴承振动数据集
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张伟涛 1 , 张亚茹 1 , 许诺 1 , 黄菊 2
振动工程学报 | 2025,38(9): 2123-2129
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振动工程学报 | 2025, 38(9): 2123-2129
宽转速范围航发主轴轴承振动数据集
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张伟涛1 , 张亚茹1, 许诺1, 黄菊2
作者信息
  • 1.西安电子科技大学信息力学与感知工程学院,陕西 西安 710071
  • 2.中国航发贵阳发动机设计研究所,贵州 贵阳 550081

通讯作者:

张伟涛(1983—),男,博士,教授。E-mail:
Vibration data set of main shaft bearing of aero engine with wide speed range
Weitao ZHANG1 , Yaru ZHANG1, Nuo XU1, Ju HUANG2
Affiliations
  • 1.School of Information Mechanics and Sensing Engineering, Xidian University, Xi’an 710071, China
  • 2.Research Institute of Guiyang Aero Engine Design Corporation of China, Guiyang 550081, China
出版时间: 2025-09-10 doi: 10.16385/j.cnki.issn.1004-4523.202309049
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轴承故障诊断是航空发动机预测与健康管理的重要研究内容,该领域的信号处理算法和深度学习模型都依赖于数据集,然而已公开的数据集通常覆盖的转速范围窄、转速间隔大、载荷单一,且缺少复合故障数据,难以支撑故障诊断方法向实用化发展。本文公开了一个宽转速范围的航发主轴轴承振动数据集,该数据集除提供单一故障数据外,也提供了多种轴承复合故障数据,覆盖了不同载荷下宽转速范围的多通道轴承振动信号。数据集很好地支撑了经典故障诊断算法的研究,同时由于数据覆盖的转速范围宽、转速采样率高,因此更有利于训练基于深度学习的故障诊断模型。

振动数据集  /  航发主轴轴承  /  宽转速

Bearing fault diagnosis is an important research topic in aviation engine prediction and health management. Signal processing algorithms and deep learning models in this field rely on datasets. However, publicly available datasets generally cover narrow speed ranges, large speed intervals, single loads, and a lack of composite fault data, making it difficult to support the practical development of fault diagnosis methods. This article discloses a vibration dataset of aircraft main shaft bearings with a wide speed range. In addition to providing single fault data, this dataset also provides multiple composite bearing fault data, covering multi-channel bearing vibration signals with a wide speed range under different loads. The dataset well supports the research of classic fault diagnosis algorithms, and due to the large speed range covered by the data and high-speed sampling rate, it is more conducive to training deep learning fault diagnosis models.

vibration data set  /  main shaft bearing of aero engine  /  wide speed
张伟涛, 张亚茹, 许诺, 黄菊. 宽转速范围航发主轴轴承振动数据集. 振动工程学报, 2025 , 38 (9) : 2123 -2129 . DOI: 10.16385/j.cnki.issn.1004-4523.202309049
Weitao ZHANG, Yaru ZHANG, Nuo XU, Ju HUANG. Vibration data set of main shaft bearing of aero engine with wide speed range[J]. Journal of Vibration Engineering, 2025 , 38 (9) : 2123 -2129 . DOI: 10.16385/j.cnki.issn.1004-4523.202309049
轴承是机械系统的重要组成部件,其功能是支撑和减少机械部件之间的摩擦。在严苛的工作条件下,航发主轴轴承早期微小的故障很快就会发展成为严重故障,这将导致机械系统的整体工作性能降低。因此,及时诊断轴承的早期微弱故障显得尤为重要。
常见的轴承故障诊断方法包括温度法、润滑液分析法、声发射信号分析法和振动信号分析法等,其中振动信号分析法因其较好的实时性和可靠的诊断效果得到了广泛的应用。目前,基于振动信号分析的故障诊断方法主要分为信号处理诊断算法和深度学习诊断算法两大类。典型的信号处理故障诊断算法包括主成分分析法、独立分量分析法、小波分析法和盲信号提取算法等[1-6]。这些算法旨在从观测信号中抑制干扰分量,然后通过提取人工经验特征完成故障诊断,其故障诊断性能主要取决于采用的信号处理技术和设计的人工经验特征,无须大量轴承故障数据。然而传统信号处理算法的性能受轴承工况影响很大,复杂工况下信号处理方法的故障诊断可靠性和准确率将急剧下降。基于深度学习的故障诊断算法需要利用大量的轴承故障数据对构建的网络模型进行训练,模型经过训练后,能够对观测信号进行处理,并基于处理结果实现故障预测。相比较而言,深度学习诊断算法具有更高的故障诊断可靠性和准确率,是目前故障诊断领域的研究热点。然而深度学习模型的训练依赖大量的轴承故障数据,同时数据集大小和质量会直接影响网络的训练效果。
目前在轴承故障诊断领域已公开了一些数据集,但这些数据集还存在不足之处。首先,大部分数据集只提供了特定转速下的轴承振动信号。例如,在美国凯斯西储大学公开的CWRU数据集[7]中,轴承振动信号的转速被固定在1797 r/min左右;在美国机械故障预防技术学会公开的MFPT数据集[8]中,轴承振动信号的转速被固定在1500 r/min左右;在美国辛辛那提大学公开的IMS轴承数据集[9]中,轴承振动信号的转速被固定在1990 r/min左右。在实际应用中,轴承的工作转速范围往往较宽,而以此类数据集作为训练集的模型无法处理其他转速下的数据。因此,需要具有宽转速范围的轴承数据来进一步验证现有算法的有效性。
然而,现有的可变宽转速范围轴承数据存在转速间隔较大的问题。例如,意大利-都灵理工大学公开的DIRG轴承数据集[10]。该数据集专门用于测试高速航空轴承,其转速范围为6000~30000 r/min,而转速的采集步长为6000 r/min。这种数据集的转速间隔较大,导致训练出的故障诊断模型在检测其他转速的轴承振动信号时存在困难。其次,目前公开的数据集中大多数的载荷范围较小。例如,2012年IEEE PHM比赛使用的FEMTO-ST数据集[11]中的轴承载荷为4~5 kN。然而,这种载荷范围的数据集无法有效地被用于分析不同载荷对轴承故障的影响。因此需要具有宽载荷范围的轴承数据集,以便更全面地研究和理解载荷对轴承故障的影响。此外,已公开的数据集大多仅提供单一故障工况下的振动观测信号,而缺乏复合故障工况下的振动观测信号。例如,加拿大渥太华大学公开的轴承诊断数据集[12]包含了3种轴承的健康状况和4种轴承转速状况,总共提供了12种工况下的观测信号。然而,该数据集并未给出复合故障工况下的观测信号,因此难以将其用于验证轴承复合故障的诊断算法。
为了解决现有公开数据集存在的问题,并提高轴承故障诊断技术的可靠性和适用性,本文设计了轴承振动数据采集试验,建立了一套宽转速范围轴承数据集,数据集可访问主页自由下载(https://zhwt-xidian.github.io/resource/homepage/#OPEN-RESOURCES)。相较于现有数据集,该数据集转速采集间隔更小,转速采样率更高。此外,每种故障类型都提供了不同载荷下的观测信号,且包含了轴承复合故障的多通道观测信号。所提数据集有助于分析和验证轴承故障诊断算法的诊断效果,对于深度模型的训练提供了大数据样本支撑。
为完成轴承故障诊断分类任务,采集了一组数据集,该数据集包括无故障轴承和故障轴承在不同转速和载荷下的振动信号。为了方便后续处理和分析,将振动信号以.mat文件格式进行保存。接下来,将详细介绍试验的数据采集方案和数据格式。
在数据采集中,使用洛阳轴承研究所设计研制的SB25轴承试验机开展轴承振动数据采集试验。试验轴承是型号为D276126NQ1U的双半内圈三点接触球轴承,它是某型号航空发动机中支撑高压压气机的前支点止推轴承,具体尺寸及参数如表1所示。
航发轴承试验台如图1所示,试验轴承安装在设备机壳内的轴承座上,轴承内圈采用过盈配合与主轴连接,轴承外圈则固定在轴承座上。高功率变频电机通过联轴器与主轴连接,可通过调节变频电机转速模拟主轴旋转,本试验中电机转速范围限定为1000~10000 r/min。两个直流振动电机用于模拟其他部件的振动干扰,分别安装在设备机壳顶部和侧面。通过液压装置,试验机可以对试验轴承施加径向和轴向载荷,试验中施加的径向载荷固定为2.5 kN,轴向载荷根据主轴转速在4~9 kN范围内变化。
试验轴承共有5种状态:正常状态、内圈故障、外圈故障、滚珠故障和保持架故障。图2展示了4种故障状态下的具体故障位置,这些故障是通过电火花工艺(EDM)在轴承的相应部位进行加工得到的。
为采集到能够真实反映轴承状态的振动信号,在试验机外壳、轴承的轴向和径向共布置8个加速度传感器。8个传感器的具体布置位置如图3所示,其中,AC0、AC1和AC7安装在轴承座外壳上,用于采集不同载荷下的振动信号;其余 5个传感器吸附在试验机外壳上,用于采集不同转速下的振动信号。
数据采集选用远程控制的方式,采集系统主要分为硬件系统和软件系统两部分。数据采集硬件系统包括主控计算机、NI-PXIe数据采集箱、PXIe-4492数据采集卡、NI远程控制模块和加速度传感器。在该系统中,数据采集卡被安装在数据采集箱中,用于采集轴承振动信号,采样率为20 kHz,采集时长为10 s。远程控制模块用于实现主控计算机和数据采集箱之间的通信,并通过光纤传输信号。加速度传感器用于记录轴承的振动信号。
采集数据过程中分别考虑了无干扰和有干扰两种情况,采集数据框架如图4所示。无干扰数据包含单一故障数据和复合故障数据两种类型,有干扰数据只包含部分复合故障数据。这主要是由于单一故障类型多,航发轴承更换工序复杂,而且转速密集,采集大量有干扰的轴承振动数据所需时间太长。在试验设计中,复合故障主要包含内圈-外圈复合故障和内圈-外圈-滚珠复合故障两种。
油泵是航空发动机中的重要部件,它为发动机中的旋转组件提供润滑油,具有润滑和冷却发动机内部零件的重要作用。油泵在发动机启动后必须连续工作,其在工作过程中会产生较大的连续周期性振动干扰,因此对轴承振动信号带来很大干扰。试验中采用直流振动电机模拟油泵工作时产生的振动干扰,因此启动直流振动电机后,采集得到的有干扰数据是轴承故障源信号和干扰信号的叠加。
数据集公开了包含5种单一轴承状态的数据,其中包括内圈故障、外圈故障、滚珠故障和保持架故障4种故障状态数据,以及无故障的正常状态数据。这些数据以.mat文件的形式进行存储,分别命名为:Inner.mat、Normal.mat、Outer.mat、Ball.mat和Cage.mat。存储结构采用struct结构体,包含了Num_of_sample_points、Channel、Load、Rotate_speed和Data这5个域,域的含义如表2所示。
振动信号采样值的通用获取形式为:F. Data (i, j, m, n),其中F对应不同故障类型;第1维度索引i对应不同振动信号采样点;第2维度索引j对应不同通道;第3维为转速维,转速索引m用于指示不同转速,其对应的转速v=800+200×m,具体对应关系如表3所示;第4维度索引n对应不同载荷。各维度索引具体含义及使用方法举例如下:
Inner. Data (300, 2, 3, 2)Ball. Data (17000, 5, 17, 1)
● 300:第 300 个样本点● 17000:第 17000 个样本点
● 2:第 2 通道● 5:第 5 通道
● 3:对应转速为 1400 r/min● 17:对应转速为 4200 r/min
● 2:高载荷● 1:低载荷
数据集中公开了24组复合故障数据,每组数据时长为5 s,采集数据的具体情况如表4所示。复合故障数据公开的数据文件是.mat文件,统一命名为:信号类型_转速_载荷_故障类型_干扰类型。每部分的含义如下:
信号类型:AC,表示源信号由加速度传感器采集得到;
复合故障转速:包含1000、3000、5000 r/min三种情况;
复合故障载荷:00(表示4 kN载荷)、02(表示6 kN载荷),具体载荷情况如表5所示;
故障类型:12(内圈-外圈复合故障)、123(内圈-外圈-滚珠复合故障);
干扰类型:有干扰(后缀为interfer0)、无干扰(无后缀)。
例如,文件名AC_1000_00_12表示在无干扰条件下,主轴转速为1000 r/min,轴向载荷为4 kN(00),采集的是内圈-外圈复合故障(12)的加速度信号。AC_1000_02_123_interfer0表示在直流振动电机干扰下,主轴转速为1000 r/min,轴向载荷为6 kN(02),采集的是内圈-外圈-滚珠复合故障(123)的加速度信号。
利用本文公开的宽转速轴承振动信号数据集,采用经典故障诊断方法和深度学习算法对采集到的信号进行数据分析和处理。
轴承故障特征频率是指在轴承发生故障时,由于轴承内部结构的特定几何形状和运动特性而产生的振动频率。内、外圈故障是最常见的轴承故障形式,对应的故障特征频率计算公式分别为:
fi = v2×60(1+dDmcosα)z
fo = v2×60(1dDmcosα)z
式中,fi为内圈故障特征频率;fo为外圈故障特征频率;α为接触角;Dm为节圆直径;z为钢球数量;d为钢球直径。计算得到:fi=162.59Hzfo=120.74Hz
经典故障诊断方法如频谱分析方法、盲信号分离方法、盲信号提取方法以及谱峭度方法等,将各种信号分解方法与包络谱分析相结合,实现信号降噪以及去除各种干扰后,对振动信号进行频谱分析,检测和识别理论故障特征频率成分,从而判断出轴承故障的具体类型。
为验证本文提供的宽转速轴承数据集的有效性,使用提出的基于CCA盲提取的循环维纳滤波算法和多通道循环滤波算法[13]在本数据集上进行轴承故障诊断试验。试验中,选取一组名为AC_1000_00_12_infer0的轴承复合故障数据,通过数据文件名可以看出:数据故障类型为内圈-外圈复合故障,转轴转速为1000 r/min,轴承试验机轴向载荷为4 kN,并加入了连续周期性的直流振动电机干扰,电机振动频率为40 Hz。选取故障数据多个通道信号中的通道1信号作为单通道循环维纳滤波器的输入信号。多通道循环滤波算法能够充分利用数据集观测信号所有通道的不同信息,自适应地调节各个通道所占比重,无需再选择通道信号。通道1观测信号包络谱如图5所示。
可以看到,观测信号包含了17.09 Hz的转频成分、125.1 Hz的外圈故障成分和159.9 Hz的内圈故障成分,且有频率为143.4和177 Hz的转频调制信号成分。需要说明的是,内圈故障特征频率附近存在转频调制现象是因为内圈故障的绝对位置会随着轴的转动而周期性变化。观察各成分幅值,内圈故障信号幅值远大于其余成分,内圈故障信号明显。因此,将该信号作为算法输入信号时,提取内圈故障源信号较容易,提取外圈故障源信号则比较困难。
为衡量两种算法对单一故障源信号的提取效果,定义信号干扰比SIR。由于轴承故障诊断一般是根据故障组件的特征频率来完成的,因此SIR的计算主要关注的是故障特征频率及其倍频,一般情况下二倍频成分已经很微弱,所以关注的频率范围上限到故障特征频率的二倍频即可。在主轴转速为1000 r/min下,SIR计算公式的频率范围为:0~400 Hz,该范围已经完全覆盖了轴承所有组件的故障特征频率及其二倍频。具体计算公式如下:
SIR=ρs/ρi
式中,ρs表示待提取的故障分量的幅值;ρi表示除去目标故障特征频率成分及其倍频分量后的最大干扰故障源信号的幅值。SIR值越大,说明算法放大目标成分信号、抑制干扰成分信号的作用越强,盲提取效果越好。
经过单通道循环维纳滤波算法与多通道循环维纳滤波算法得到的内圈故障输出信号包络谱如图6所示。两种方法输出信号的SIR分别为2.376和2.611,可见论文公开的数据集经两种方法处理,对内圈故障成分均取得了很好的提取效果,其中多通道循环维纳滤波算法输出信号的SIR值更高,提取效果更好。
现有的故障诊断方法对于固定转速和载荷下的轴承故障分类是可行的。然而,面对不同转速和不同载荷工况时,这些方法的分类效果并不理想[14-18]。为了提高多种工况下轴承故障分类的效果,基于深度学习的故障诊断方法被提出,这种方法能够更加有效地提取不同工况下的轴承故障信号的特征[19-22]。本文利用公开的数据集对一种深浅层特征融合神经网络(DSFNN)[23]进行训练和诊断测试验证。
图7给出了神经网络模型的结构,主要由卷积层、残差层、多尺度特征融合模块以及全连接层组成。在多尺度特征融合模块中,残差块的特征输出在通道方向上进行融合,这有助于提高网络的特征识别能力,从而提升网络的分类性能。
本文公开的宽转速轴承振动数据集中包含不同载荷的轴承振动信号,载荷的变化范围为4~9 kN,相比于其他数据集,载荷变化范围更宽,可以更有效地分析不同载荷对轴承故障的影响。不同载荷的轴承振动数据可以用来对比各类模型的收敛性能,试验将DSFNN模型和现有的LeNet模型、MSCNN模型和动态加权密集连接网络进行对比,结果如图8所示。
本文提出的DSFNN模型在经过200次迭代后,可以达到100%的准确率,相比于其他3种方法具有更快的收敛速度。随着迭代次数的增加,DSFNN模型的损失函数稳定下降,而LeNet模型、MSCNN模型和动态加权密集连接网络在训练过程中,损失函数均会出现比较明显的波动,因此DSFNN模型的收敛过程更加稳定。
另外,公开的数据集中包含不同转速下的轴承振动信号,转速变化范围为1000~10000 r/min,转速递增间隔为200 r/min,相较于其他数据集,本数据集具有较宽的转速变化范围和较小的转速递增间隔,可以更好地比较不同分类网络的性能。试验对比了各分类网络在不同转速下的故障分类正确率,结果见图9。结果表明,在高转速工况下,DSFNN模型相比其他网络表现出更为明显的优势。在转速为9100 r/min时,DSFNN模型的分类正确率为97.8%,相比于LeNet模型的分类正确率提高了4.2%。需要说明的是,在9100 r/min转速下,4种对比方法的分类正确率普遍较低,这可能是由于数据采集过程中电机转速不稳定导致故障特征频率漂移而引起的。
为了使轴承故障诊断方法不断向实用化方向发展,本文公开了一组宽转速范围、多载荷条件下的航发轴承振动数据集。该数据集包含了正常轴承和故障轴承在多个转速和载荷下的轴承振动数据。利用本文公开的数据集验证了基于CCA的循环维纳滤波故障诊断算法以及典型的基于深度学习的故障诊断模型。试验结果表明,经典算法以及深度学习算法都能在本数据集上完成轴承故障诊断分类任务。本文公开的数据集具有更宽的转速范围和较小的转速间隔,更有利于深度学习模型的训练。此外数据集包含了复合故障信号,为进一步研究复合故障的诊断提供了有利条件。
  • 国家自然科学基金资助项目(62471367)
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doi: 10.16385/j.cnki.issn.1004-4523.202309049
  • 接收时间:2023-09-15
  • 首发时间:2026-02-09
  • 出版时间:2025-09-10
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  • 收稿日期:2023-09-15
  • 修回日期:2024-01-03
基金
国家自然科学基金资助项目(62471367)
作者信息
    1.西安电子科技大学信息力学与感知工程学院,陕西 西安 710071
    2.中国航发贵阳发动机设计研究所,贵州 贵阳 550081

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张伟涛(1983—),男,博士,教授。E-mail:
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2种不同金属材料的力学参数

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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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