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Visualization of propagation signals accompanied by contact using cross-correlation method based on in-place fast haar wavelet transform

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4 Author(s)
Masatake Kawada ; Institute of Technology and Science, The University of Tokushima, 2-1 Minami-Johsanjima, Tokushima, 770-8506, Japan ; Koji Yamada ; Yasutomo Kaneko ; Katsuo Isaka

In this paper we present the results of applying the cross-correlation (CC) method based on the in-place fast Haar wavelet transform (IpFHWT) to visualize the propagation signals associated with contact on a model turbine rotor. It is required to detect typical vibration and to localize the position of failure in turbine and generator accurately. Because modern power plants usually use one-high pressure and one or two lower pressure turbines and a generator, we use the turbine model with three rotors. The cross-correlation of acceleration signals is obtained in the time-frequency domain by using the CC-IpFHWT. From the cross-correlation the signals accompanied by the contact can be extracted.

Published in:

2009 IEEE Power & Energy Society General Meeting

Date of Conference:

26-30 July 2009