Vibration Signal Analysis of Roadheader Based on Referential Manifold Learning

Table 2

Characteristic parameters.

Time domain features	Mark symbol	Wavelet analysis feature	Mark symbol
Peak and peak value	pk	Energy ratio1	E1
Effective value	st	Energy ratio2	E2
Absolute mean	me	Energy ratio3	E3
Pulse factor	va	Energy ratio4	E4
Kurtosis value	Kr	Energy ratio5	E5
Margin factor	L	Energy ratio6	E6
Peak factor	C	Energy ratio7	E7
Waveform factor	S	Energy ratio8	E8