Design of Hydraulic Support Control System Based on Double CAN Buses

Aiming at the problems of bad environment in fully mechanized mining working face in mine and a large number of nodes of hydraulic support,the paper proposed a design scheme of hydraulic support control system based on double CAN buses.It analyzed working environment of the system,gave structure of the system and introduced design of hardware and software of controller nodes in details as well as expounded implementation of double CAN buses communication.The system classifies data on bus into adjacent support operation data and support state data according to working requests of the system,and transfers these data through two different channels,which can realize automatic switch function of the channels when one bus has fault.The practical application showed that real-time performance of the system is better than of single CAN bus when two CAN buses and all nodes are in normal working condition.Specially,under interruption condition of one CAN bus,the communication system based on single CAN bus will not work,but the communication system based on double CAN buses will work normally and real-time and reliability performance of the system will not decline.The scheme provides a new design idea for application of double CAN buses and enhancing performance of communication network of hydraulic support control system.