Application of Reassigned Wavelet Scalogram in Wind Turbine Planetary Gearbox Fault Diagnosis under Nonstationary Conditions

Table 2

Planetary gearbox configuration.

Gear	Number of gear teeth
	Stage 1	Stage 2
Ring	100	100
Planet	40 (4)	36 (4)
Sun	20	28

Note: the number of planet gears is in the parenthesis.