Research On Intelligent Loading System For Static Load Test Of Railway Precast Girder

Static load test is one of the most important methods to test the overall quality of railway precast girder. At present, the loading device of the static load test has been extensively studied at domestic. But the loading system of static load test is still using artificial way to control multiple jacks, and there are many problems for this way of loading. In order to make the static load test of precast girder accurate and efficient completion, this paper has completed the designing and research of the loading system of static load test for the precast girder, to meet the development requirements of automation and information.This paper introduced the situation of domestic and foreign research and the development tendency of the loading system of static load test for the precast girder. Through the investigation for the static load test of the precast girder and analysis the cycle steps and requirements of static load test, the reasonable design would be completed. The mathematical model of the intelligent loading system of static load test for the precast girder had been established. The simulink module that was a package of Matlab software model had completed the model and simulation of the mathematical model of the control system. According to the simulation result of the control system, the decision that the fuzzy PID control algorithm would realize the overall system control had generated, at last the control parameter and the control algorithm and the control rules for the control system had completed preliminary. The design of control system was mainly composed of the hydraulic cylinder synchronous loading, synchronization unloading and maintaining the pressure in the loading cycle. These institutions action would be realized through the electrical control system and hydraulic system. This paper analyzed the loading operation of system and put forward the control method. It decided to use the mitsubishi PLC and mitsubishi special module for the control system at the same time made the decision of the selection of these products. With the control method, the paper includes the flow chart of PLC, electrical connection, the design of program of PLC and touch screen interface. Finally, debugging and optimization of software and equipment to make it meet the requirements of static load test and the design targets.