Release Time:2022-06-26  Hits:

Date of Publication: 2013-01-01

Journal: 大连理工大学学报

Issue: 3

Page Number: 447-454

ISSN: 1000-8608

Abstract: In order to control the earth pressure balance (EPB) of pressure chamber more accurately and efficiently during tunneling process ,an integrated optimization control method is proposed for cutter head system ,thrust system and discharge system .A stratum identification system is designed which takes the torque penetration index (TPI) and field penetration index (FPI) as input character parameters .An expert control system is established ,and it can give the control strategy of cutter speed based on the quantitative results of stratum identification and control rules .On this basis ,a least squares-support vector machine (LS-SVM ) nonlinear predictive control strategy is given to coordinatively control advance speed and screw conveyor speed , and the control variables can be rollingly optimized by means of ant colony system (ACS) algorithm .The experiments show that the earth pressure balance in chamber can be controlled very well even though the working condition changes ,which demonstrates the effectiveness of this method and the earth pressure balance in chamber can be realized by multiple subsystems coordinative optimization control .

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