基于压力动态平衡的盾构密封舱压力控制方法

发布时间：2019-03-29 11:10

【摘要】：针对盾构密封舱压力系统缺乏机理模型,无法实现快速准确地压力控制问题,在密封舱压力控制机理分析基础上建立了密封舱压力动态平衡的数学模型。采用离散元法对密封舱压力场进行仿真,研究刀盘开口率、埋深等因素对密封舱压力传递关系的影响,分析了密封舱隔板压力与测点压力的映射关系,定义了密封舱压力传递系数,并在此基础上提出了密封舱压力控制的参考压力值设定过程。考虑密封舱压力系统机理模型的非线性与时变特点,提出密封舱压力的双变量最优控制策略。基于土压平衡盾构密封舱压力控制试验台对所提控制方法进行试验验证,研究结果表明:控制精度与速度均能满足适应地质变化的密封舱压力系统控制要求。
[Abstract]:Aiming at the lack of mechanism model of the pressure system of the shield sealed cabin, the problem of rapid and accurate pressure control cannot be realized, and a mathematical model of the pressure dynamic balance of the sealed cabin is established on the basis of the analysis of the pressure control mechanism of the sealed cabin. The pressure field of the sealed cabin is simulated by the discrete element method, the influence of the factors such as the opening rate and the depth of the cutter head on the pressure transmission of the sealed cabin is studied, the mapping relation between the pressure of the partition plate of the sealed cabin and the pressure of the measuring point is analyzed, the pressure transmission coefficient of the sealed cabin is defined, And a reference pressure value setting process for the pressure control of the sealed cabin is put forward. Considering the nonlinear and time-varying characteristics of the mechanism model of the pressure system of the sealed cabin, the two-variable optimal control strategy of the pressure of the sealed cabin is put forward. The test results show that the control precision and speed can meet the control requirements of the pressure control of the sealed cabin adapting to the geological change.
【作者单位】：大连理工大学机械工程学院;大连工业大学机械工程及自动化学院;大连理工大学工业装备结构分析国家重点实验室;大连理工大学控制科学与工程学院;
【基金】：国家重点基础研究发展计划资助项目(973计划,2007CB714006,2013CB035402)
【分类号】：U455.43

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