scholarly journals Vibration Analysis Based on Time-Frequency Analysis with Digital Filter

2013 ◽  
Vol 7 (4) ◽  
pp. 441-455 ◽  
Author(s):  
Yoshiaki ITOH ◽  
Naoto YAMAGUCHI ◽  
Toru YAMAZAKI
Keyword(s):  
Frequency Analysis ◽  
Digital Filter ◽  
Vibration Analysis ◽  
Time Frequency Analysis ◽  
Time Frequency

Space-time visualization of vibration of a ribbed cylinder

2000 ◽  
Vol 214 (10) ◽  
pp. 1259-1271 ◽  
Author(s):  
J Woodhouse ◽  
J Power
Keyword(s):  
Frequency Analysis ◽  
Cross Sections ◽  
Vibration Analysis ◽  
Experimental Approach ◽  
Space Time ◽  
Theoretical Modelling ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Vibrational Response ◽  
Engineering Vibration

Data from an axial array of sensors along a ribbed cylindrical structure may be analysed to allow the evolving vibrational response to impulsive driving to be plotted as a function of space and time. The process is carried out separately in a series of frequency bands, by first carrying out a time-frequency analysis at each position. Aspects of the behaviour not previously discussed are highlighted by this analysis. These aspects are discussed in the light of a previously published theoretical model [1]. Since reflections from the cylinder's ends also play a role here, it has been necessary to develop further theoretical modelling to interpret the measurements. The new experimental approach, which is described here as the method of ‘space-time cross-sections', has scope for application to other problems involving structure-borne vibration. This illustrates the power of time-frequency analysis and its extensions for engineering vibration analysis.

Time-Frequency Analysis of Partial Discharge Phenomena in SF6 gas using Wavelet Transform

1997 ◽  
Vol 117 (3) ◽  
pp. 338-345 ◽  
Author(s):  
Masatake Kawada ◽  
Masakazu Wada ◽  
Zen-Ichiro Kawasaki ◽  
Kenji Matsu-ura ◽  
Makoto Kawasaki
Keyword(s):  
Wavelet Transform ◽  
Frequency Analysis ◽  
Partial Discharge ◽  
Time Frequency Analysis ◽  
Time Frequency
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