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

Table 1

Parameter identification results of three methods.

Vibration parameters	Theoretical value	Traditional two-parameter method	Improved two-parameter method in reference [23]	New improved two-parameter method
Vibration amplitude (mm)	1	1.0000247	1.0000250	1
Excitation order	12	12.00000292	12.00001197	12
Initial phase (°)	−7.2	−6.925	−6.915	−7.2
Resonance frequency (Hz)	143.244	143.244	143.244	143.244
Constant deviation (mm)	0.2	0.199949	Unrecognized	Unrecognized