基于PLC的灌浆压力自动控制系统设计与试验研究

来源期刊:中南大学学报(自然科学版)2013年第10期

论文作者:王超 徐力生 徐蒙 姚翠霞 黄辉

文章页码:4055 - 4063

关键词:灌浆;压力波动;可编程逻辑控制器;模糊PID控制

Key words:grouting; pressure fluctuation; programmable logic controller; fuzzy PID control

摘    要:针对灌浆压力易受被灌地层复杂地质条件、灌浆设备结构形式和人工控制滞后性等因素影响而发生大范围波动的问题,为了实现灌浆压力的动态检测和自动控制,以可编程逻辑控制器(PLC)、压阻式压力传感器、伺服电机、驱动器、减速机和电动调节阀等作为核心部件,基于参数自整定模糊PID控制算法编写控制程序,设计灌浆压力自动控制系统。该系统通过对压力传感器的反馈压力进行闭环周期修正,控制伺服电机的正、反转来调整阀门开度使压力保持稳定。研究结果表明:当灌浆压力在0~5 MPa内变化时,灌浆压力自动控制系统可在5~6 s的响应时间内实现压力自动控制,并将控制精度保持在压力设定值的5%以内,稳定性良好,其控制性能优于现行人工控制模式,满足现场灌浆施工的需要。

Abstract: Aimed at large-scale fluctuations of grouting pressure caused by complex geological conditions of grouting strata, grouting equipment structure, manual control hysteresis and other factors, in order to achieve dynamic detection and automatic control on grouting pressure, the grouting pressure automatic control (GPAC) system was designed based on the control program written by parameter self-tuning fuzzy-PID control algorithm, with core components of programmable logic controller (PLC), piezoresistive pressure transducer, servo motor, driver, reducer and electric control valve. Measured feedback values of piezoresistive pressure transducer can be closed-loop cycle corrected, and the valve opening can be adjusted by servo motor reversing to keep the grouting pressure stable under GPAC system control. The simulation results show that grouting pressure can be automatic controlled in 5-6 s and control precision can be kept on less than 5% of designed pressure value by grouting pressure automatic control system when the grouting pressure changes in the range of 0-5 MPa. Control performances of GPAC system are better than manual control mode, so the need of grouting construction can be well fulfilled.

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