Research Article
A Condition Monitoring Method of Hydraulic Gear Pumps Based on Multilevel Mechanism-Data Fusion
| Feature | Equation | Feature | Equation |
| Maximum value | | Root mean square | | Minimum value | | Square mean root | | Peak value | | Crest factor | | Peak to peak | | Pulse factor | | Mean value | | Margin factor | | Mean absolute value | | Waveform factor | | Variance | | Kurtosis factor | | Standard deviation | | Skewness factor | |
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