The Study Of Hydraulic Synchronous Control Of Lifting Platform Of The Straddle-Type Monorail Vehicle Bogie Separated Equipment

The straddle-type monorail system has the significant advantage which is simple structure,small spacing,strong capability of being adaptation to the terrain,environmental protection and cozy,short construction period and so on,it can relieve pressure of traffic congestion in the city efficiently and improve existence quality for city guaranteeing the sustain development of the city traffic, it will gradually turn into a kind of track traffic type that is commonly used.Bogie separation device is the key maintenance equipment to ensure the normal operation of Monorail vehicle, The research of the straddle-type monorail bogie separation device has just started in China, Chongqing light rail line II is the first the straddle-type bogie separation device currently in our country. Since the delivery, the equipment has been provided effective protection to the maintenance of the straddle-type monorail bogie and the safe operation of light rail train, while in the course of using, there were also some problems, that mainly were the problems of the accurate alignment of the lifting beam and the track beam and the control of motion stabilization and level stability of the platform. In order to completely solve the problems to ensure the safety of equipment and to further improve the performance of the device, there need a comprehensive upgrade and maintenance to the equipment.In this paper, based on the analysis of development status of the bogie separation device at home and abroad bogie, and the research status of synchronous control technique, proposed the hydraulic synchronous control plan based on the use of high-frequency response proportional directional valve, and the digital hydraulic cylinder built-in sensor. In this paper derived mathematical models of valve control asymmetric hydraulic cylinder and high-frequency response proportional valve, established mathematical models of a single set of valve controlling cylinder system and hydraulic synchronous control system of two cylinders, on the basis, analyzed the system's static and dynamic characteristics in detail. Through the analysis of the static and dynamic characteristics of the system, we can see the performance of system can not fully meet the design requirements, in the paper corrected the system by the most widely used method--PID correction, first corrected a single set of valve control cylinder system of the hydraulic synchronization system, after correction the performance calibrations of the single set of valve control cylinder system can meet the requirements, and can ensure the accurate alignment of the lifting beam and the track beam. On this basis, then made the simulation of the hydraulic synchronization system. In this paper, applied SIMULINK software toolbox in the MATLAB to simulate the hydraulic synchronization system. From the results of simulation, we can see that this synchronization control system has higher control precision, and good dynamic characteristics, can meet the system requirements.The implementation of this project will help to design the straddle-type monorail bogie separation device that is meeting the requirements, safe and reliable, economical and practical, having independent intellectual property rights, and break the monopoly of Japan. The result of this paper has the significant theory and actual reference value to the similar equipment that is produced in the future, which is helpful to improve the development and growing of the Straddle-Type single track equipment in our country.