文章摘要
基于启发式动态规划的盾构土压平衡优化控制
The optimal control for the soil pressure balance of shield basedon heuristic dynamic programming
投稿时间:2018-03-12  修订日期:2018-04-15
DOI:
中文关键词: 土压平衡盾构  密封舱土压  启发式动态规划  神经网络
英文关键词: earth pressure balance shield  soil pressure of sealed cabin  heuristic dynamic programming  neural network
基金项目:国家自然科学基金面上项目,辽宁省博士启动基金
作者单位E-mail
刘宣宇 辽宁石油化工大学 信息与控制工程学院 xyliu@lnpu.edu.cn 
许胜 辽宁石油化工大学 信息与控制工程学院  
张凯举 辽宁石油化工大学 信息与控制工程学院  
摘要点击次数: 42
全文下载次数: 
中文摘要:
      为了避免盾构施工造成地表变形而引发安全事故,建立有效的密封舱土压平衡自动控制方法是至关重要的。为此,提出了一种新的基于启发式动态规划(heuristic dynamic programming,HDP)的盾构机土压平衡优化控制方法,该方法能够实现盾构机多参数实时协调优化控制。基于神经网络,构建组成密封舱土压HDP控制器的执行网络、模型网络和评价网络,采用梯度下降算法对网络权值进行在线训练;利用评价网络迭代逼近密封舱土压优化控制代价函数,将多级优化问题简化为单级优化,从而显著降低实时计算负荷;执行网络以最小化代价函数为目标,对多参数同步协调优化,获得推进速度、刀盘扭矩、总推力、螺旋输送机转速的最优值。仿真结果表明该方法能够有效控制密封舱土压平衡,控制过程更加快速、稳定,并且具有较强的抗干扰能力。
英文摘要:
      In order to avoid the safety accidents caused by shield construction, it is very important to establish an effective automatic control method for the soil pressure balance of sealed cabin. For that, a new soil pressure balance optimal control method was proposed based on heuristic dynamic programming(HDP) for shield machine, which can coordinated control the multiple parameters on time. Based on neural network, the action network, model network and critic network of the HDP controller were constructed, and the gradient descent algorithm was used to train the network weights online. The critic network was used to approximate the optimal control cost function of soil pressure in sealed cabin, so that the multi-stage optimization problem was simplified to single-stage optimization, which greatly reduced the calculation load. With the goal of minimizing the cost function of sealed cabin, the action network realized the synchronous and coordinated optimization of multi-variable such as advancing speed, cutterhead torque, total thrust and screw conveyor speed. The simulation results show that the method can effectively control the soil pressure balance of sealed cabin and has strong anti-interference ability. What’s more, the control process is quicker and steadier.
View Fulltext   查看/发表评论  下载PDF阅读器
关闭