Power Spectral Density of Hydraulic Pumps
Hojjat Ahmadi, Zeinab Khaksar
Electronic Devices, Vol. 1, No. 1, 2012.
DOI: 
Link: http://www.dline.info/ed/fulltext/v1n1/2.pdf
Abstract:
Vibration analysis is the main conditions monitoring techniques for machinery maintenance and fault diagnosis. Practical experience has shown that this technique in a machine condition monitoring program provides useful reliable information, bringing significant cost benefits to industry. Many vibration environments are not related to a specific driving frequency and may have input from multiple sources which may not be harmonically related. With these types of vibration, it may be more accurate, or of more interest to analyze and test using random vibration. In this research we were calculated grms(Root-Mean-Square Acceleration) and Power Spectral Density (PSD) of Naji crane hydraulic pump in different faults situations. The results showed that different faults were showed different PSD vs. frequency. The results showed that with calculating PSD we could find some fault and diagnosis of hydraulic pump as soon as possible.