Real-time Performance And Reliability Research Of Railway Rescue Crane CAN Bus

Railway rescue crane is the key equipment to deal with the railway vehiclederailment accident, to eliminate obstacles along the railway and to ensure the safetyof railway transportation. The real-time performance and reliability of railway rescuecrane electric control system are important index of national railway rescuecapability. Control system is the key part of the crane. Analyzing the performance ofcontrol system, improving the technical level and overall performance have greatsignificance to improve crane accident rescue capability and to reduce the losscaused by accident.The1700t m railway rescue crane is taken as the research object. This thesismainly research on the CAN Bus of the upper-structure control system. CAN is shortfor Controller Area Network, which is applied for serial data communication. CANBus is widely used in automobile and engineering machinery field because of its highstability and anti-jamming capability. Large amount of papers relevant to CAN Bushave been read during this research to analyze the protocol and the frame structure ofthe CAN Bus.The CAN Bus load rate calculation formula is derived based on CANBus principle. Then the load factor verification experiment is built, the actual busload rate is obtained through MATLAB, and the CAN network typical schedulingmethod is studied. After that, the principle of the scheduling method, the schedulablecondition and its advantages and disadvantages are analyzed. The railway rescuecrane electric control system is built. The Stateflow model of CAN Bus is also builtbased on the standard CAN protocol, the fixed priority scheduling method RM andthe dynamic priority scheduling method EDF. The real-time and reliability influenceof node with different bus network scheduling method are analyzed throughsimulation. The influence mainly manifested on the successful rate and delay time ofsending node messages.The thesis analyzes the actual load rate and theoretical load rate of CAN Bus through experimental results. It also analyzes the railway rescue crane CAN busmodule based on standard CAN protocol, fixed priority scheduling method RM anddynamic priority scheduling method EDF to verify the scheduling method influenceon the network efficiency and data delay time of CAN network performance. Theresearch on the scheduling method for CAN bus application of railway rescue cranecontrol system has great significance to improve the crane electric control systemnetwork performance and it is significant to improve the practical rescue ability.