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编码器安装误差抑制的轴承外圈故障特征提取

徐万通 郭瑜 陈鑫

徐万通, 郭瑜, 陈鑫. 编码器安装误差抑制的轴承外圈故障特征提取[J]. 航空动力学报, 2024, 39(8):20220584 doi: 10.13224/j.cnki.jasp.20220584
引用本文: 徐万通, 郭瑜, 陈鑫. 编码器安装误差抑制的轴承外圈故障特征提取[J]. 航空动力学报, 2024, 39(8):20220584 doi: 10.13224/j.cnki.jasp.20220584
XU Wantong, GUO Yu, CHEN Xin. Feature extraction of bearing outer ring fault for encoder installation error suppression[J]. Journal of Aerospace Power, 2024, 39(8):20220584 doi: 10.13224/j.cnki.jasp.20220584
Citation: XU Wantong, GUO Yu, CHEN Xin. Feature extraction of bearing outer ring fault for encoder installation error suppression[J]. Journal of Aerospace Power, 2024, 39(8):20220584 doi: 10.13224/j.cnki.jasp.20220584

编码器安装误差抑制的轴承外圈故障特征提取

doi: 10.13224/j.cnki.jasp.20220584
基金项目: 国家自然科学基金(52165067); 云南省科技计划重大专项项目(202002AC080001)
详细信息
    作者简介:

    徐万通(1995-),男,硕士生,主要研究方向为齿轮箱故障特征提取。E-mail:xwt_kust@163.com

    通讯作者:

    郭瑜(1971-),男,教授、博士生导师,博士,主要研究方向为机械动态测试技术。E-mail:kmgary@163.com

  • 中图分类号: V263.6;TH133.33

Feature extraction of bearing outer ring fault for encoder installation error suppression

  • 摘要:

    针对编码器信号中安装误差导致轴承外圈故障特征提取困难的难题,提出一种编码器安装误差抑制方法。该方法依据编码器安装误差特性,结合方均根包络技术,获得原始瞬时角速度信号上包络线。基于分段逐步逼近技术和绝对平均差指标,结合反斜率修正方法,进一步拟合编码器安装误差分量。采用改进能量比指标自适应确定优化包络线窗长,并获得对应的剩余信号。通过剩余信号的包络谱,获取轴承外圈故障特征频率,揭示故障特征。与传统抑制周期性分量的倒谱预白化方法相对比,该方法清晰地提取出滚动轴承外圈的前3阶故障特征阶次,证明了该方法对编码器误差有较好的抑制效果,仿真和实验验证了所提方法的有效性。

     

  • 图 1  编码器信号采集原理

    Figure 1.  Encoder signal acquisition principle

    图 2  编码器安装误差示意图

    Figure 2.  Schematic diagram of encoder installation error

    图 3  不同偏心率ρRe的变化趋势

    Figure 3.  Variation trend of Re under different ρ conditions

    图 4  不同倾斜角αRs的变化趋势

    Figure 4.  Variation trend of Rs under different α conditions

    图 5  安装误差的相位对极值的影响

    Figure 5.  Effect of installation error phase on extremum

    图 6  不同ωt)对IAS信号的影响

    Figure 6.  Effect of different ωt) on IAS signal

    图 7  不同包络线拟合结果

    Figure 7.  Fitted results by different envelopes

    图 8  所提方法技术路线

    Figure 8.  Flow chart of proposed scheme

    图 9  反斜率法修正前的包络线

    Figure 9.  Envelope before adjusted by inverse slope method

    图 10  反斜率法修正后的包络线

    Figure 10.  Envelope adjusted by inverse slope scheme

    图 11  分段平移调整后的包络线

    Figure 11.  Segmented translation adjusted envelope

    图 12  仿真波形及包络谱图

    Figure 12.  Simulation waveform and envelope order spectrum

    图 13  不同方法处理结果对比

    Figure 13.  Results obtained by different schemes

    图 14  实验台

    Figure 14.  Test rig

    图 15  滚动轴承外圈故障示意图

    Figure 15.  Schematic diagram of rolling element bearing outer race fault

    图 16  不同方法处理结果

    Figure 16.  Results obtained by different schemes

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出版历程
  • 收稿日期:  2022-08-10
  • 网络出版日期:  2023-11-20

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