NDLI: Comparison of Hydraulic Pump Faults Diagnosis Methods: Wavelet vs. Spectral Analyses

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Gao, Yingjie Zhang, Qin Kong, Xiangdong
Copyright Year	2005
Abstract	This paper introduces two faults diagnosis methods, a conventional spectral analysis method and a wavelet transform method, for hydraulic pump applications. The fundamental technologies of both methods, as well as their performance in detecting a few common hydraulic pump defects, are described in this paper. The performance of both diagnoses methods were evaluated based on experimental results. In order to eliminate the effects of border distortion arising from applying wavelet transform to finite-length signals, the pump outlet pressure in this case, a preprocess on the obtained signals is carried to clean up the errors prior to faults diagnosis analysis. Validation results obtained from both methods in analyzing the same data sets indicated that the wavelet transform based method showed a more sensitive and robust detecting capability than that obtained from a spectrum analyses approach.
Sponsorship	Fluid Power Systems and Technology Division
Starting Page	73
Ending Page	78
Page Count	6
File Format	PDF
ISBN	0791842207
DOI	10.1115/IMECE2005-81711
e-ISBN	0791837696
Volume Number	Fluid Power Systems and Technology
Conference Proceedings	ASME 2005 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2005-11-05
Publisher Place	Orlando, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Multi-resolution analysis (mra) Wavelet transform Fault detection Fft spectrum analysis Hydraulic pump Wavelet transforms Spectroscopy Wavelets Hydraulic pumps
Content Type	Text
Resource Type	Article

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