A Data-Driven Method for Predicting the Cutterhead Torque of EPB Shield Machine

Table 2

Correlation coefficients among cutterhead torque and other key parameters on the stationary driving dataset.

	CRS	AV	PPA	PPB	PPC	PPD	RSSC	RA	PA	CT
CRS	1	0.83	0.65	0.81	0.78	0.55	0.84	0.25	0.21	0.91
AV	0.83	1	0.74	0.85	0.88	0.61	1.00	0.29	0.25	0.95
PPA	0.65	0.74	1	0.78	0.76	0.72	0.75	0.68	−0.02	0.76
PPB	0.81	0.85	0.78	1	0.84	0.58	0.85	0.52	−0.02	0.89
PPC	0.78	0.88	0.76	0.84	1	0.63	0.88	0.42	0.13	0.88
PPD	0.55	0.61	0.72	0.58	0.63	1	0.62	0.23	0.28	0.60
RSSC	0.84	1.00	0.75	0.85	0.88	0.62	1	0.29	0.26	0.95
RA	0.25	0.29	0.68	0.52	0.42	0.23	0.29	1	−0.53	0.34
PA	0.21	0.25	−0.02	−0.02	0.13	0.28	0.26	−0.53	1	0.19
CT	0.91	0.95	0.76	0.89	0.88	0.60	0.95	0.34	0.19	1