Diagnosis of bearing defects by variational modes decomposition from vibratory and acoustic emission measurements. (2nd September 2019)

• Record Type: Journal Article
• Authors: Zarour, Djamal; Thomas, Marc; Meziani, Salim
• Is Part Of: International journal of vehicle noise and vibration. Volume 15:Number 1(2019)
• Page Start: 21
• Page End: 41
• Publication Date: 2019-09-02
• Subjects: variational mode decomposition -- VMD -- empirical mode decomposition -- bearing fault -- operational modal analysis -- OMA -- vibration -- acoustic emission; Automobiles -- Noise -- Periodicals; Automobiles -- Vibration -- Periodicals; 629.231
• Languages: English
• ISSNs: 1479-1471

Abstract

In order to improve the diagnosis of bearing defects, a new method called variational mode decomposition (VMD) is proposed. This research shows an experimental application for the detection of bearing defects at two stages of degradation: at the early stage and at an advanced stage. In this work, a comparative experimental study between vibratory and acoustic emission measurements, analysed by VMD, is carried out. However, the application of this method requires determining the number of significant frequencies (K) and a balancing parameter (α). For this purpose, the operational modal analysis (OMA) and a correlation study are used to determine the required parameters K and α. The results show that both measurement methods work well to detect the bearing frequencies, but the vibration measurement was more sensitive for an early detection.