Fault Diagnosis of Balancing Machine Based on ISSA-ELM

Table 1

Fault features.

Description	Features
Maximum
Minimum
Mean
Absolute mean
Square root amplitude
Peak-peak value
Variance
Standard deviation
Kurtosis
Skewness
Mean square
Root mean square
Waveform factor
Peak factor
Pulse factor
Margin factor
Kurtosis factor
Frequency of center of gravity
Mean square frequency
Root mean square frequency
Frequency variance
Frequency standard deviation