Design of Pneumatic Hardware-in-the-Loop Simulation Platform for Electro-hydraulic Valve Fault Analysis
According to the development requirements of fault diagnosis and state sensing function of valve port independent electro-hydraulic valve,a hardware in the loop simulation experimental platform for high-frequency valve core electromagnet loading and fault driven by high-speed on-off valve and low inertia cylinder is designed and built,and the performance of the experimental platform is preliminarily tested.The simulation platform drives the high-speed on-off valve by PWM signal,controls the displacement and output force of the piston rod of the double acting cylinder,regulates the simulated working conditions of the proportional electromagnetic loads on the valve spool,and realizes the semi physical simulation of the faults in the electro-hydraulic valve.The experimental platform is established based on ARM platform and integrates field effect driving circuit and sensing elements such as displacement sensor,tension pressure sensor and current sensor,which can capture the dynamic characteristics of valve spool under simulated working conditions.The preliminary results have shown that through different PWM diving signals,the loads on the valve spool can be actively controlled and various stiction degrees can be achieved,which verifies the functionality of the platform.
fault diagnosisindependent valve porthardware in the loop simulationhigh speed on-off valvedouble acting cylinder
万方数据
维普
