Bearing Health Monitoring Based on the Orthogonal Empirical Mode Decomposition

Table 1

Test rig main characteristics.

Electric motor	Asynchronous three-phase
	220 V 3.4 A Δ
	380 V 1.95 A Y
	cos φ = 0.79
	P = 0.75 kW
	ω = 1400 rpm
Bearings	SKF YAR 206-2F
	SY506M housing
Driving pulley	ϕi = 51 mm
	ϕe = 78 mm
Driven pulley	ϕi = 77 mm
	ϕe = 106 mm
First test rig natural frequencies	1° mode 300 Hz, 2° mode 1850 Hz, 3° mode 5800 Hz