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应用故障特征指标相对比值的低转速下编码器信号太阳轮故障特征提取

李震焘 郭瑜 尹兴超 华健翔

李震焘, 郭瑜, 尹兴超, 华健翔. 应用故障特征指标相对比值的低转速下编码器信号太阳轮故障特征提取[J]. 机械科学与技术, 2023, 42(7): 1044-1049. doi: 10.13433/j.cnki.1003-8728.20220064
引用本文: 李震焘, 郭瑜, 尹兴超, 华健翔. 应用故障特征指标相对比值的低转速下编码器信号太阳轮故障特征提取[J]. 机械科学与技术, 2023, 42(7): 1044-1049. doi: 10.13433/j.cnki.1003-8728.20220064
LI Zhendao, GUO Yu, YIN Xingchao, HUA Jianxiang. Encoder Signal Feature Extraction of Sun Gear Fault at Low Speed Using Relative Ratio of Fault Feature Index[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(7): 1044-1049. doi: 10.13433/j.cnki.1003-8728.20220064
Citation: LI Zhendao, GUO Yu, YIN Xingchao, HUA Jianxiang. Encoder Signal Feature Extraction of Sun Gear Fault at Low Speed Using Relative Ratio of Fault Feature Index[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(7): 1044-1049. doi: 10.13433/j.cnki.1003-8728.20220064

应用故障特征指标相对比值的低转速下编码器信号太阳轮故障特征提取

doi: 10.13433/j.cnki.1003-8728.20220064
基金项目: 

国家自然科学基金项目 52165067

云南省重点领域科技计划项目 202002AC080001

详细信息
    作者简介:

    李震焘(1994-), 硕士研究生, 研究方向为旋转机械故障特征提取, chlz759@163.com

    通讯作者:

    郭瑜, 教授, 博士生导师, kmgary@163.com

  • 中图分类号: TH17;TH132.425

Encoder Signal Feature Extraction of Sun Gear Fault at Low Speed Using Relative Ratio of Fault Feature Index

  • 摘要: 针对低转速下太阳轮齿根裂纹故障编码器信号特征阶次提取困难的问题,本文提出了一种基于故障特征指标相对比值的特征提取检测方法。首先,将获得的编码器信号通过向前差分处理成瞬时角速度(IAS)信号,按照1/3-二叉树对得到的IAS信号进行子频带划分;其次,对各窄带信号进行包络分析,分别求取正常和故障状态下的IAS信号各子频带的谐波显著性指标(HSI),由此可计算得到其相对比值r;再次,利用r值选取包含故障信息丰富的频带;最后,对处理后的信号在选择的子频带处进行带通滤波,并在提取包络后进行谱分析,提取故障特征。对太阳轮齿根裂纹故障的实测编码器信号进行分析,验证了该方法能有效提取太阳轮故障的特征。
  • 图  1  故障特征提取流程图

    Figure  1.  Fault feature extraction process flowchart

    图  2  行星齿轮箱故障诊断综合实验台

    Figure  2.  Comprehensive experimental platform for planetary gearbox fault diagnosis

    图  3  太阳轮齿根裂纹

    Figure  3.  Sun gear tooth root crack

    图  4  正常状态下的原始IAS信号

    Figure  4.  The original IAS signal under normal conditions

    图  5  故障状态下的原始IAS信号

    Figure  5.  The original IAS signal under a fault condition

    图  6  HSI的颜色映射图

    Figure  6.  Color mapping of HSI

    图  7  故障状态下的滤波信号包络阶比谱(HSI指标)

    Figure  7.  Envelope order spectrum of filtered signals under a fault condition(HSI metrics)

    图  8  正常状态下的滤波信号包络阶比谱(HSI指标)

    Figure  8.  Envelope order spectrum of filtered signals under normal conditions(HSI metrics)

    图  9  相对比值r的颜色映射图

    Figure  9.  Color mapping of relative ratio value r

    图  10  故障状态下的滤波信号包络阶比谱(本文方法)

    Figure  10.  Envelope order spectrum of filtered signals under a fault condition(The method in this paper)

    图  11  正常状态下的滤波信号包络阶比谱(本文方法)

    Figure  11.  Envelope order spectrum of filtered signals under normal conditions(The method in this paper)

    表  1  行星齿轮箱参数

    Table  1.   Planetary gearbox parameters

    名称 行星轮 太阳轮 齿圈
    齿数 31 21 84
    变位系数 0.1 0.18 0.12
    下载: 导出CSV

    表  2  行星齿轮箱特征阶次

    Table  2.   Planetary gearbox feature orders

    齿轮啮合阶次Om 太阳轮转频阶次Os 太阳轮故障阶次Osr 行星架转频阶次Oc
    84×
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-07-19
  • 刊出日期:  2023-07-25

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