Research on electro-hydraulic control system of hydraulic support based on Ethernet and CAN-Bus

Based on the low reliability and real-time performance of current hydraulic support remote control system,a novel control system was proposed to combine Ethernet and CAN-bus,the system architecture was built and the pro- gram was implemented. According to the actual working condition,some improvements were achieved. The characteris- tics of hydraulic support control system was analyzed,and the TCP / IP communication protocol based on improved TDM was tested for estimating the theoretical loop time (260 ms),which satisfied the communication requirement. The local control characteristics of hydraulic support were analyzed,the CAN-Bus communication based on dynamic priority algorithm was designed for reducing communication conflicts and low reliability. By combining TCP / IP and CAN-Bus, the redundant-ability and reliability were improved. Finally,the experiment was conducted to verify the communication function and prove the high reliability and real-time performance of hydraulic support control system.