Research Article

Root Crack Identification of Sun Gear in Planetary Gear System Combining Fault Dynamics with VMD Algorithm

Figure 11

Each IMF of angular acceleration signal for no crack and 1# to 3# crack. (a) No crack. (b) 1# crack. (c) 2# crack. (d) 3# crack.
(a)
(b)
(c)
(d)