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

Table 1

Correlation coefficient matrix of some key operation parameters based on the start-up dataset.

	CRS	AV	PPA	PPB	PPC	PPD	RSSC	CT
CRS	1	−0.13643	−0.02136	−0.00857	−0.04812	−0.09561	−0.09722	0.12934
AV	−0.13643	1	0.73151	0.70609	0.80865	0.25975	0.95053	0.75640
PPA	−0.02136	0.73151	1	0.99760	0.95197	0.34319	0.73406	0.83770
PPB	−0.00857	0.70609	0.99760	1	0.94163	0.34318	0.71289	0.83657
PPC	−0.04812	0.80865	0.95197	0.94163	1	0.36540	0.79748	0.80595
PPD	−0.09561	0.25975	0.34319	0.34318	0.36540	1	0.28389	0.15211
RSSC	−0.09722	0.95053	0.73406	0.71289	0.79748	0.28389	1	0.79534
CT	0.12934	0.75640	0.83770	0.83657	0.80595	0.15211	0.79534	1