基于小波包频带能量检测技术的故障诊断.pdfVIP

故障诊断 文章编号：1008-0570(2006)02—1-0202--03 基于小波包频带能量检测技术的故障诊断 OntheFault basedonthe ofWaveletPacket Diagnosis DetectingTechnology Band Energy (萤庆上学院)张兢路彦和 Lu，Yanhe Zhang，Jing 摘要：在机械设备的在线检测和故障诊断中，振动信号分析是十分重要的手段。-I、泣包变捷能将振动信号按任意时频分辨率 分解到不同师段，而各频段信号的能量变化包含着丰富的信，E-。在机械设备运行正常和非正常两种状况下，小渡包分解后 各频段信号的能量谱尺度图有明显差异。将小波包能量谱尺度图检测方法用于轴承振动信号的诊断处理，验证了该检测 方击有救、可行．为机械故障诊断提供了一条新的途径。 关键词：小波包：振动信号；能量谱：故障诊断 中图分类号：TN911．23：THl65．3文献标识码：A Abstract：Intheonlinedetectionandfault formechanical isan means．The diagnosis signalannlyslsimportant equipment，vibzating ofwavelet enable tobe intodfftErent bandsatrandom resolu— changes packet vibratingsignals decomposed frcqucncy time—frequency tions．while of atvarious handscmlminsrichinformation．Underboth(‘Ⅲmn㈣sofnormal the energy．changessignals frequency abnormal the after and ofmechanical existevidentdifferences working working equipment，there amongenergyspectrumscalolvams the ofwavelet ofthe methodwithwavelet in packet．Theapplicationdetecthlg packetenergyspectrum diag— decomposition sealogram nosls ofthc demonstratestheeffectivenessand ofthis feasibilitydetectingmethod，which processinghearingsvibratingsignals pro— ridesanew formcchanicalfanlt way diagnosis． words：wavelet Key packet；vibratingslgnal；energyspectruro；faultdiagnosis