Fault Diagnosis in Electromotor Pumps using Vibration Analysis
Hojjat Ahmadi, Zeinab Khaksar
Journal of Electronic Systems, Vol. 2, No. 1, 2012.
DOI: 
Link: http://www.dline.info/jes/fulltext/v1n1/1.pdf
Abstract:
Power Spectral Density (PSD) refers to the amount of power per unit of frequency as a function of the frequency. The PSD describes how the power (or variance) of a time series is distributed with frequency. In this research, we calculated Grms (Root-Mean-Square Acceleration) and PSD of NAJI fire pump on healthy and unhealthy situations. In addition, we calculated Grms and PSD of NAJI fire pump electromotor on healthy, misalign and looseness situations. The results showed that different situations showed different PSD vs. frequency. With calculating PSD, we could find some fault and diagnosis of pump and electromotor as soon as possible. The results of this paper have given more understanding on the dependent roles of vibration analysis and Power Spectral Density carve in predicting and diagnosing of the pump and the electromotor faults.