基于同步压缩变换的阶比分析法在城市轨道交通 车辆轴承故障诊断中的应用
王冰魏志恒王文斌戴源廷赵俣钧
Application of Order Ratio Analysis Based on Synchrosqueezing Transforms in Fault Diagnosis of Urban Rail Transit Vehicle Rolling Bearings
WANG BingWEI ZhihengWANG WenbinDAI YuantingZHAO Yujun
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作者信息:中国铁道科学研究院集团有限公司城市轨道交通中心， 100081， 北京
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Affiliation:Urban Rail Transit Center of China Academy of Railway Sciences,100081, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.07.007
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中图分类号/CLCN:TH133. 3
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栏目/Col:研究报告
摘要:
针对城市轨道交通车辆轴承在变速过程中的振动信号呈现非平稳性特征的情况，提出了基于SST（同步压缩变换）的阶比分析方法。首先对强噪声环境下轴承振动信号进行SST时频分析处理，对振动信号中的瞬时频率进行估计，并提取瞬时转频；然后利用得到的瞬时转频计算鉴相时标，对时域信号进行重采样，得到准稳态的角域信号；最终完成车辆变速过程中轴承的故障诊断。试验表明，该方法能够有效地提取变转速轴承振动信号中的转频成分，实现基于瞬时频率估计的阶比分析，成功进行变速过程中轴承的故障诊断。
Abstracts:
Aiming at the non-stationary characteristics of vibration signal shown by bearing of urban rail transit vehicle during speed change process, a method of order analysis based on synchrosqueezing transforms (SST) is proposed. Firstly, the bearing vibration signal in strong noise environment is processed by SST time-frequency analysis, where the instantaneous frequency in the vibration signal is estimated, and the instantaneous frequency is extracted. Then, the obtained instantaneous frequency is used to calculate the phase discrimination time scale, and the time-domain signal is resampled to obtain the quasi steady-state angular domain signal. Finally, the bearing fault diagnosis in the process of vehicle speed change is completed. The experiment results show that this method can effectively extract the rotational frequency in the bearing vibration signal, and realize the order analysis based on the instantaneous frequency estimation, which allows successful bearing fault diagnosis in the process of speed change.
引文 / Ref:
王冰，魏志恒，王文斌，等.基于同步压缩变换的阶比分析法在城市轨道交通车辆轴承故障诊断中的应用[J].城市轨道交通研究，2021，24(7):30.
WANG Bing，WEI Zhiheng，WANG Wenbin，et al.Application of order ratio analysis based on synchrosqueezing transforms in fault diagnosis of urban rail transit vehicle roling bearings[J]. Urban Mass Transit，2021，24( 7 )：30.
WANG Bing，WEI Zhiheng，WANG Wenbin，et al.Application of order ratio analysis based on synchrosqueezing transforms in fault diagnosis of urban rail transit vehicle roling bearings[J]. Urban Mass Transit，2021，24( 7 )：30.
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