A vibration signal analysis method based on enforced de-noising and modified EMD

作者：Jun, He; Zhang, Qinghua; Sun, Guoxi; Yang, Ji-Cheng; Xiong, Jianbin

来源：International Journal of Signal Processing, Image Processing and Pattern Recognition, 2015, 8(1): 87-98.

DOI：10.14257/ijsip.2015.8.1.09

• Cosine window functions
• EMD
• Intrinsic Mode functions
• Linear correlation coefficient
• Machinery fault diagnosis
• Vibration signal
• Vibration signal analysis
• Wavelet

To deal with the noise from rotating machinery vibration signal and analysis the fault signal, a rotating machinery fault diagnosis method based on enforced de-noising and modified EMD is proposed. Firstly, fault signals were de-noised by the wavelet with enforced threshold in order to filter the noises in the high frequency, and then the EMD method used to decompose the fault signals into a finite number of stationary intrinsic mode IMFs), then the linear correlation coefficient between two sets of data is proposed to select the useful IMF. In order to restrain the endpoint effect of EMD, in this paper, the cosine window function is employ to the fault signals, and then the envelope error of the fault signals is controlled at the both endpoints of the vibration signals. Experimental results shows: this proposed method can extract the fault information effectively, with overcoming the drawbacks of EMD well.

• 出版日期2015
• 单位华南理工大学