Study For Hydraulic Thrust Control System Of Double Shield Tunnel Boring Machine

Double Shield Tunnel Boring Machine is a special tunnel boring machine, contains machine, hydraulic and control, widely used in complex terrane tunnel construction. Double Shield TBM rely on the hydraulic thrust system to advance, as boring machine's a key system, the hydraulic thrust system achieve the thrust and pose adjusting, the system's concert action can make boring machine to keep the right pose, and ahead thrust along the supposed tunnel line as soon as quickly. Recently, along with many big long tunnel to come forth, the thrust system is asked for higher, the important research aspect is automation and intelligentize.The development history and trend of boring machine is introduced in the paper. The principle of operation is analyzed on double shield TBM's hydraulic thrust system. The upper and lower workstation is used in the monitoring system, Industrial Computer is adopted to monitor the hydraulic system in the upper workstation, and PLC is adopted to control the hydraulic system in the lower workstation, the Wincc configuration software is used for confige the control system. Considering of the hydraulic's non-linear and the affect of complex operating condition, the control algorithm of RBF Neural Network Self-tuning PID is adopted. The tunnel is divided into straight line and curve, in the straight line, the master-slave synchronization control strategy is adopted, in the segment of curve and thrust deviation, the attitude adjustment strategy is used for thrust and have the attitude automatically adjusted. Basis the fact to optimum design of the relevant parametre, the simulation model of hydraulic thrust system is established in AMESim environment. the S-function of the relevant control strategy is written and the module of control system is created in MATLAB environment. Then the co-simulation of hydraulic and control system was carried out by means of the AMEsim and MATLAB/Simulink software interface. At last, on the electro-hydraulic proportion experiment device, the electro-hydraulic proportion control system is built to simulate the tunneling machine thrust and to validate the control algorithm. The simulation and experiment show that these results adapt to the practical application for double shield TBM's hydraulic thrust system.