Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2012.1960.1965DorostgholAliDorfeshanMasoud1220121218In the first stage of failure, the vibrations of gearboxes
have a low range, which are often covered with stronger vibrations of the system.
Thus, diagnosing the faults of the gears of the gearbox is difficult among the
vibrations of other parts of the machine. In this regard, varied mathematical
methods have been used, each having its own potentials and shortcomings. Fast
Fourier Transforms (FFT) and Short-Time Fourier Transform (STFT) are two of
these methods. However, due to the wide range of gearbox faults, distinguishing
these faults is not possible via the aforementioned methods. So, with regard
to the capability of empirical model decomposition EMD method in distinguishing
faults, this study investigates the gearboxes vibration signals practically
and in laboratory. First some intentional faults are applied on the experimental
gearboxes. Then, the group of vibration signals of varied faults is collected
and the data collected from the practical test are analyzed. Finally, a neural
network was offered for an intelligent fault diagnosis of the gearbox. The findings
verified the suggested methods (computing standard deviation and root-mean-square)
not only are accurate enough but also have reduced the size of computations
to a great extent.]]>Shen, Z., X. Chen, X. Zhang and Z. He,2012Wowk, V., 2000McFadden, P.D. and J.D. Smith,1984Paya, B.A., I.I. Esat and M.N.M. Badi,1997Baydar, N. and A. Ball,2001Newland, D.E., 1994Wang, C. and R.X. Gao,2003Peng, Z.K. and F.L. Chu,2004Tse, P.W., J.Y. Zhang and X.J. Wang,2006Jardine, A.K.S., D. Lin and D. Banjevic,2006Fan, X. and M.J. Zuo,2006Farina, D., M.F. Lucas and C. Doncarli,2008Samanta, B.,2004Ebersbach, S. and Z. Peng,2008Rafiee, J. and P.W. Tse,2009Rafiee, J., F. Arvani, A. Harifi and M.H. Sadeghi,2007Rafiee, J., P.W. Tse, A. Harifi and M.H. Sadeghi,2009Yang, W. and P.J. Tavner, 2009Parey, A., M. El Badaoui, F. Guillet and N. Tandon,2006Loutridis, S.J., 2004Lei, Y., Z. He and Y. Zi, 2009Ricci, R. and P. Pennacchi,2011Huang, N.E., Z. Shen, S.R. Long, M.C. Wu and H.H. Shih et al.,1998