APPLICATION OF SOME SELECTED STATISTIC FUNCTIONS IN DIAGNOSTICS OF ELECTRIC MACHINES
 
PAWEŁ IDZIAK
   
Abstract:
The discussion of possibility to use chosen statistic functions for diagnostic of electrical machines was done. The information contained the averaging value of vibration speed or displacement some parts of tested machines is not enough to forecast the long of its the technical condition, specially when the vibration process is progress as a stochastic. In the case, the authors propose to apply the auto-correlation and cross-correlation functions to filtering the measurements signals. The paper presents the effects of measure of vibration speed of an air compressor. The results of the transformation of measurement signals were done. The one of measure points was the reference point and other were roving points. Used the functions, the displacement of the roving points were calculated. The simply AUTOCAD programme allow to illustrate the new shape of construction.
   
Key Words: electrical machinery, vibration, spectrum, auto-correlation, cross-correlation, deflection shape, measurements
   
 
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