Detection of Cracks in Rotating Shafts by Using the Combination Resonances Approach and the Approximated Entropy Algorithm

<div>FFTs of the rotor vibration responses for the healthy and cracked shaft. Experimental responses as excited by the diagnostic frequency of 48.7 Hz at node #4: (a) horizontal response at node #8; (b) horizontal response at node #28.</div>

Shock and Vibration

fig15

Figure 15

Figure 15: Detection of Cracks in Rotating Shafts by Using the Combination Resonances Approach and the Approximated Entropy Algorithm 