Cyclostationary Processes: Application in Gear Faults Early Diagnosis

Author: Capdessus C.   Sidahmed M.   Lacoume J.L.  

Publisher: Academic Press

ISSN: 0888-3270

Source: Mechanical Systems and Signal Processing, Vol.14, Iss.3, 2000-05, pp. : 371-385

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Abstract

The paper introduces the theory of cyclostationary processes as a powerful tool for the diagnosis of rotating machines. It is shown that the well-known synchronised averaging method is the expression of cyclostationarity at the first order, and that the spectral correlation function issued from the second-order cyclostationarity is an efficient parameter for the early diagnosis of faults in rotating machines. Moreover, it is shown that vibration signals measured on gear systems display second-order cyclostationarity. Application in early diagnosis of spalling in gear teeth demonstrates the power of this new parameter.