Composite Fault Diagnosis for Rotating Machinery of Large Units Based on Evidence Theory and Multi-Information Fusion

Table 1

Five dimensionless parameters.

Waveform index	Impulse index	Margin index	Peak index	Kurtosis index
;	;	;	;

Note: is the vibration time-domain signal; is the probability density function; is the kurtosis value; is the maximum value; is the RMS value; is the square root amplitude; is the average amplitude.