Research Article

Fault Diagnosis for Reducer via Improved LMD and SVM-RFE-MRMR

Figure 8

Original waveforms of various states of the gearbox: (a) vibration signal of normal state, (b) vibration signal of broken tooth fault, (c) vibration signal of 4# bearing inner circle fault, (d) vibration signal of 4# bearing outer circle fault.
(a)
(b)
(c)
(d)