Composite Fault Diagnosis for Rotating Machinery of Large Units Based on Evidence Theory and Multi-Information Fusion

Figure 5

Vibration time-domain curves of the composite fault states: (a) gear teeth missing and bearing outer ring; (b) gear teeth missing and bearing inner ring wear; (c) gear teeth missing and bearing lack of ball bearings; (d) large and small gear teeth missing; (e) large and small gear teeth missing and bearing outer ring wear; (f) large and small gear teeth missing and bearing inner ring wear.

(a)

(b)

(c)

(d)

(e)

(f)