Shrinkage Performance Test System of Hydraulic Support Based on LabVIEW RT

In order to solve the key problem of measurement and control technology for shrinkage test of 30 000 kN hydraulic support test rig, this paper proposes a new method of remote real-time measurement and control system of hydraulic support based on LabVIEW RT. The high frequency electro hydraulic proportional directional valve is adopted as the actuating element of the hydraulic system of the plunger cylinder, and the high precision displacement sensor is used as the feedback element of the real-time closed loop system, by using the fuzzy PID control algorithm running in the embedded real-time controller to adjust the proportional direction valve opening in real time, the hydraulic support can be used to keep the oil cylinder of the external loading platform synchronized to prevent external loading platform from blocking. The paper introduces the hardware structure design, the software design of slave computer and host computer. The practical application shows that the system has very high real-time and robustness, the error of the external loading platform is less than 1 mm during the shrinkage test of the hydraulic support.