Traditional Teager energy demodulation operator method is susceptible to strong background noise in elevator operating systems,thus an enhanced energy demodulation operator method is proposed.This approach combines B-spline technique with the traditional Teager energy operator method,B-spline curves are utilized to filter the signal interpolation.Subsequently,the filtered signal is transferred by the Teager energy operator.Finally,Fourier transform is employed to obtain the spectrum diagram of the con-verted signal,revealing the fault characteristics.The proposed energy demodulation method based on the B-spline interpolation not only retains the advantages of traditional energy demodulation algorithms such as high precision and excellent time resolution,but also can extract the weak bearing fault characteristics of the strong noise backgrounds.The experiments verify the improved performance in the bearing fault detection under the strong background noise conditions,enabling the detection of early-stage fault degradation,it meets the applications of practical fault diagnoses.
关键词
电梯电机/轴承故障诊断/解调方法/B样条插值/Teager能量算子
Key words
elevator motor/bearing fault diagnosis/demodulation method/B-spline interpolation/Teager energy operator
维普
万方数据