Identification Uncertainties of Bending Modes of an Onshore Wind Turbine for Vibration-Based Monitoring

Table 4

Median of the natural frequencies , identification range, and identification rate of the studied bending mode pairs for the selected EOCs from the middle of October 2021 to the end of September 2022.

Mode pair	FA (Hz)	SS (Hz)	Identification range (Hz)	Identification rate (%)
1	0.309	0.297	0.24 Hz–0.36	61.9
2	1.445	1.475	1.25 Hz–1.7	40.9
3	3.144	3.036	2.8 Hz–3.35	54.5
4	3.602	3.788	3.35 Hz–4.2	78.5