Synchronous Vibration Parameters Identification of Variable Rotating Speed Blades Based on New Improved Two-Parameter Method without OPR Sensor

Table 2

Identification results of synchronous vibration parameter based on test data.

Identification parameters	Resonance region 1		Resonance region 2		Standard errors of two methods
	New method	Reference [23] method	New method	Reference [23] method
Vibration amplitude (mm)	0.9769	0.9763	1.0360	1.0406	0.0033
Excitation order	4.1026	4.1039	2.0338	2.0277	0.0044
Resonance speed frequency (Hz)	15.9606	15.9603	44.7713	44.7709	0.0004
Resonance frequency (Hz)	63.8424	63.8412	89.5426	89.5418	0.0010
Initial phase (°)	−7.29	−7.06	−0.58	−0.15	0.35