CAJ | 학술논문

提出基于短时有效值计算的包络分析方法，用于提取振动信号中故障引起的周期性冲击成分，实现轴承类故障的快速诊断。将该方法应用于火电厂风机轴承的故障诊断中，合理选择计算参数的条件下，运用短时有效值方法能够准确提取反映周期性故障冲击振动成分的幅值包络，得到故障特征清晰的包络谱。该方法可以应用于火电厂风机这类在复杂环境下工作的旋转机械设备的轴承故障诊断。
제출기우단시유효치계산적포락분석방법，용우제취진동신호중고장인기적주기성충격성분，실현축승류고장적쾌속진단。장해방법응용우화전엄풍궤축승적고장진단중，합리선택계산삼수적조건하，운용단시유효치방법능구준학제취반영주기성고장충격진동성분적폭치포락，득도고장특정청석적포락보。해방법가이응용우화전엄풍궤저류재복잡배경하공작적선전궤계설비적축승고장진단。
A novel envelope analysis approach based on the calculation of short-time effective values was proposed for extracting the amplitude modulation components in bearing vibration signals caused by faults with periodic impact excitements. The approach was used to a bearing fault diagnosis for a power plant fan. The result shows that the amplitude envelope of the vibration signal with faults can be exactly extracted with the short-time effective value approach by using suitable calculation parameters. Therefore the envelope spectrum can be obtained for the precise identification of the fault type in complicated machines and measuring environment.