Design Of Electro-hydraulic Control System Based On Double CAN-Bus Used In Power Support

Hydraulic support is the main equipment of secure guarantee under mine, the shield support is massive uses frame. In order to enhance the working efficiency of shield support, more and more Electro-hydraulic control system is used in in the longwall. Electro-hydraulic system based on the electronic control technology, using the Bus communication technology, is in order to realize the shield support position and posture adjustment and the working surface equipment synthesis monitor and management.The number of shield support on longwal is big, so the control system is strict to realtime and security of the correspondence. This paper designs the control system baede on double CAN-bus, and completed the system hardware and the software design. The main research work is as follows:First, this paper carries on the analysis to single function, ASQ, batch movement of shield support, according to the need of the electro-hydraulic control system, designs various movements related parameter and gets the greatest time of single function through the hydraulic system simulation.Second, after analyze to the data of communication network, this paper divides the BUS data into neighbor operation and polling according to the real-time request of control system and constructs the double CAN-Bus system communication network. After system communication process analysis designs two CAN-Bus correspondence dispatches and the application layer agreement according dispatch algorithmThird, this paper uses LPC2290 as the chip of node in the CAN-bus system and design connection electric circuit of Periphery component, charring on the software programming using theμC/OS -II embedded real-time operating through dividing the system to communication, key, output, emergency shutdown, data processing and display task. All tasks are completed.Third, this paper completes the node hardware design using LPC2290, and carries on the software programming using theμC/OS -II embedded real-time operating through dividing the system into communication, key, output, emergency shutdown, data processing and display task. All tasks are completed.Last, carries on the simulation test and the scene debugging to the system, and uses the CAN-Bus analyzer to carry on the examination and the analysis to Bus data.According the simulation test and data analysis, this control system can meet the function and real-time request.