Application of orthogonal wavelets to early gear damage detection

✍ Scribed by W.J. Wang; P.D. McFadden

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 894 KB
• Volume: 9
• Category: Article
• ISSN: 0888-3270
• DOI: 10.1006/mssp.1995.0038

✦ Synopsis

Use of the orthogonal wavelet transform to detect abnormal transients generated by early gear damage from the gearbox casing vibration signal is discussed. Orthogonal wavelets, such as Daubechies 4 and harmonic wavelets, are used to transform the time domain synchronous vibration signal into the time-scale domain. The orthogonal wavelet transform uses fast algorithms and decomposes the signal onto the minimum number of wavelet series. However comparison with the non-orthogonal wavelet transform for the same length of discrete data shows that the description of the signal in the 3-dimensional map of the wavelet transform is not sufficiently comprehensive due to limited scales.