An Effective Fault Feature Extraction Method for Gas Turbine Generator System Diagnosis

Table 3

Definition of common statistical features in time-domain.

Time-domain feature	Equation
) Mean
() Maximum
() Minimum
() Standard deviation
() Root mean square
() Kurtosis
() Crest factor
() Clearance factor
() Shape factor
() Impulse factor

Note: represents a signal series for , where is the number of data points of a raw signal.