Hydraulic Pump Fault Diagnosis Method Based on EWT Decomposition Denoising and Deep Learning on Cloud Platform

Table 2

Time-domain feature extraction method.

Time-domain statistical characteristics	Time-domain statistical feature calculation formula
Mean
Absolute mean
Effective value
Average power
RMS
Peak
Peak-to-peak
Variance
Standard deviation
Skewness
Kurtosis
Shape factor
Crest factor
Impulse factor
Clearance factor
Skewness factor
Kurtosis factor