Analysis of Vibration Signal of DC Motor Based on Hilbert-Huang Transform

This paper presents a signal analysis process for improving energy completeness based on the Hilbert-Huang Transform (HHT). Firstly, the vibration signal of a DC Motor obtained by employing an accelerometer is the model used to analyze the signal. Secondly, the intrinsic mode functions (IMFs) and Hilbert spectrum of the decomposed signal are obtained by applying HHT. The results of the IMFs constituent and the original signal are compared and the process of energy loss is discussed. Finally, the differences between Wavelet Transform (WT) and HHT in analyzing the signal are compared. The simulated results reveal the analysis process based on HHT is advantageous for the enhancement of energy completeness.

Authors:

• Chun-Yao Lee
• Hung-Chi Lin

Keywords:

• Hilbert-Huang transform
• Hilbert spectrum
• Wavelettransform
• Wavelet spectrum
• DC Motor.

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