METHOD FOR DETECTING A STRUCTURAL DEFECT IN A MECHANICAL ASSEMBLY INCLUDING A ROTARY MEMBER

摘要

The invention relates to a method for detecting a structural defect in a mechanical assembly including a rotary member, wherein said method comprises a preliminary analysis for identifying a frequency characteristic of the occurrence of the defect over a revolution of said member, and the iterative steps of: measuring the instantaneous rotation speed of the rotary member; angularly sampling said measure so as to obtain a sampled signal representative of the instantaneous rotation speed of the member; carrying a harmonic space analysis of the sampled signal in order to obtain a spectrum of the instantaneous rotation speed of the member; monitoring the amplitude of the spectrum for the characteristic frequency so as to derive the occurrence of a corresponding defect based on said amplitude.