Early Fault Detection of Rolling Element Bearings Using Wavelet Packet Energy Ratio (WPER). ITEGAM-JETIA, [S. l.], v. 11, n. 56, p. 287–295, 2025. DOI: 10.5935/jetia.v11i56.2759. Disponível em: https://itegam-jetia.org/journal/index.php/jetia/article/view/2759. Acesso em: 22 oct. 2026.