Joint Amplitude and Frequency Demodulation Analysis Based on Variational Mode Decomposition for Multifault Diagnosis of a Multistage Reducer

Table 2

Multistage reducer parameters.

Parameter	First-stage planetary gear				Second-stage spur gear		Third-stage spur gear
	Sun gear	Planet gear	Ring gear	Number of planet gears	Driving gear	Driven gear	Driving gear	Driven gear
Number of teeth	28	36	100	4	29	100	36	90