Etude comparative entre les résultats donnes par la transformée en ondelettes discréte et les ondelettes empirique dans la détection des défauts mécaniques de la boite de vitesse d'une éolienne

Abstract

In this work we studied the mechanical defects of a gearbox of a wind turbine which transforms the kinetic energy of the wind into electricity to avoid breakdowns of the wind turbines during the operating period. To do this, it is necessary to detect the emerging defects in order to have the necessary time to plan the maintenance operations and to extract the signals of the symptoms more or less masked by advanced analyzes. We have proposed to analyze the real vibratory signals of a wind turbine gearbox by using the empirical wavelet transform (EWT), and we compared the results obtained by this method to those given by the method of the transformation of discrete wavelets (TOD).