Degradation State Identification of Cracked Ultrasonic Motor by Means of Fault Feature Extraction Method

<div>The MMS-PE results of standard data: (a) m = 3, τ = 6, and αZ = 9.84; (b) m = 5, τ = 2, and αZ = 103.07; (c) m = 6, τ = 3; and αZ = 180.80.</div>

Shock and Vibration

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Figure 8

Figure 8: Degradation State Identification of Cracked Ultrasonic Motor by Means of Fault Feature Extraction Method 