盾构机密封舱土压平衡综合优化控制

摘要

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 .%　　为了实现盾构机掘进过程密封舱土压平衡的精确高效控制，提出了盾构刀盘系统、推进系统和排渣系统的综合优化控制方法。设计了以扭矩切深指数（TPI）和场切深指数（FPI）为特征输入参数的地层识别系统，然后建立了专家控制系统，根据地层识别的量化结果和控制规则给出刀盘转速的控制策略；在此基础上，提出了采用最小二乘支持向量机（LS-SVM ）非线性预测控制方法来协调控制推进速度和螺旋输送机转速，并利用蚁群算法（ACS）滚动优化控制变量，实现密封舱土压平衡控制。实验结果表明即使在工况发生变化时亦能够很好地控制密封舱土压平衡，证明了方法的有效性，实现了盾构机土压平衡的多子系统协调优化控制。