Distance and Density Similarity Based Enhanced -NN Classifier for Improving Fault Diagnosis Performance of Bearings

Table 2

Statistical measures calculated over the time and frequency domain AE signal.

Parameter	Definition
Root mean square (RMS)
Kurtosis value (KV)
Peak-to-peak value (PPV)
Crest factor (CF)
Shape factor (SF)
Frequency center (FC)
RMS frequency (RMSF)
Square root of amplitude (SRA)
Skewness value (SV)
Impulse factor (IF)
Margin factor (MF)
Kurtosis factor (KF)
Root variance frequency (RVF)