液压支架试验台远程多缸同步控制系统设计

摘要

为解决30 000 kN液压支架试验台活动平台及垂直外加栽平台远程四缸同步控制技术难题,设计了基于PXI平台和LabVIEW RT的液压支架试验台远程多缸同步控制系统.采用高频电液比例方向阀作为调高油缸液压系统的执行元件,高精度位移传感器作为实时闭环系统的反馈元件,通过在嵌入式实时控制器中运行模糊PID控制算法,实时调整比例方向阀开口度,从而实现调高油缸的同步.实际应用表明,在液压支架试验台活动平台调高过程中,该系统的四缸最大同步误差为0.91 mm,四缸最小同步误差为0.63 mm.%In order to solve problem of remote four-cylinder synchronous control of active platform and vertical external loading platform of 30 000 kN hydraulic support test bench,a remote multi-cylinder synchronous control system of hydraulic support test bench based on PXI platform and LabVIEW RT was designed.High frequency electro-hydraulic proportional directional valve is adopted as actuating element of hydraulic system of high lift cylinder,and high precision displacement sensor is used as feedback element of real-time closed loop system.Synchronization of the high lift cylinder is achieved by running fuzzy PID control algorithm in embedded real-time controller and real-time adjustment of opening of the proportional directional valve.The practical application shows that the maximum four-cylinder synchronization error of the system is 0.91 mm and the minimum error is 0.63 mm during the lifting process of movable platform of the hydraulic support test bench.