DocumentCode :
1079231
Title :
Fault Detection in a Multistage Gearbox by Demodulation of Motor Current Waveform
Author :
Mohanty, A.R. ; Kar, Chinmaya
Author_Institution :
Dept. of Mech. Eng., Indian Inst. of Technol., Kharagpur
Volume :
53
Issue :
4
fYear :
2006
fDate :
6/1/2006 12:00:00 AM
Firstpage :
1285
Lastpage :
1297
Abstract :
Demodulation of vibration signal to detect faults in machinery has been a prominent prevalent technique that is discussed by a number of authors. This paper deals with the demodulation of the current signal of an induction motor driving a multistage gearbox for its fault detection. This multistage gearbox has three gear ratios, and thus, three rotating shafts and their corresponding gear mesh frequencies (GMFs). The gearbox is loaded electrically by a generator feeding an electrical resistance bank. Amplitude demodulation and frequency demodulation are applied to the current drawn by the induction motor for detecting the rotating shaft frequencies and GMFs, respectively. Discrete wavelet transform is applied to the demodulated current signal for denoising and removing the intervening neighboring features. Spectrum of a particular level, which comprises the GMFs, is used for gear fault detection
Keywords :
amplitude modulation; demodulation; discrete wavelet transforms; electric resistance; fault diagnosis; frequency modulation; gears; induction motor drives; shafts; amplitude modulation; discrete wavelet transform; electrical resistance bank; fault detection; frequency modulation; gear mesh frequencies; gear ratios; induction motor drives; machinery; motor current waveform demodulation; multistage gearbox; rotating shafts; vibration signal demodulation; Demodulation; Discrete wavelet transforms; Electrical fault detection; Fault detection; Frequency; Gears; Induction motors; Machinery; Shafts; Signal detection; Current; demodulation; fault diagnosis; gears; wavelet transforms;
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2006.878303
Filename :
1667926
Link To Document :
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