Research Article
Combined Failure Diagnosis of Slewing Bearings Based on MCKD-CEEMD-ApEn
Figure 3
Time-domain signals of various conditions (the data were acquired on Oct. 15, 2015; Oct. 25, 2016; and Oct. 26, 2017, resp.).
(a) Normal condition |
(b) Early fault condition |
(c) Severe fault condition |