Fault Diagnosis of Electric Impact Drills Based on Time-Varying Loudness and Logistic Regression

<div>(a) EID with a faulty sun gear connecting the motor and gearbox; (b) EID with a faulty ring gear; (c) EID with a faulty planet gear. Faults are highlighted in the red ovals.</div>

Shock and Vibration

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Figure 3

Figure 3: Fault Diagnosis of Electric Impact Drills Based on Time-Varying Loudness and Logistic Regression 