Wheel-rail Girder Hoister Hoisting Mechanism Control System Design

According to the railway medium and long-term development plan, China’s railway passenger dedicated line and large-scale construction of rail transit line has begun. Higher requirements for railway bridges and great difficulty in track laying construction bound to promote the development of related technologies. Wheel-rail girder hoister, beam traveler and bridge layer are key devices in service of concrete beam manufacturing and erecting in high-speed railway and rail transit construction. Among these, wheel-rail girder hoister is used to lift, transfer, and load whole section, dual track box beams to beam travel cars in precast yard. It can also assist in installation of bridge erections and beam travel cars and hoisting of framework of steel reinforcement and models. Because of obvious advantages of wheel-rail girder hoister in construction of railway and rail transit construction, the market capacity of wheel-rail girder hoister increasing year by year.The working condition of wheel-rail girder hoister is complicate, a lot of uncertain factors such as wind speed, load, motor synchronization causing interference to the stability of the work. Hoisting mechanism as one of the most important subsystem of girder hoister has heavy load. Hook synchronicity needs to be kept during multiple windlass driving. The dynamic characteristics of hoisting mechanism will be directly related to the operation stability of the machine. A lot of research and analysis work is to be done for a company production 900 ton wheel-rail girder hoister from the viewpoint of simple and practical. The purpose of the study is to design an appropriate control system which can meet the working needs of wheel-rail girder hoister hoisting mechanism, and to get higher synchronization control precision during multiple windlass driving.The main work is as follows:1. The research is based on the application of 900 ton wheel-rail girder hoister in railway construction, make analysis about the application and the mechanism of hoisting mechanism as well as working conditions of wheel-rail girder hoister. Analysis wheel-rail girder hoister development present situation and development trend domestic and overseas.2. Make research on the present situation of the modern industrial control system, according to the working content of hoisting mechanism of wheel-rail girder hoister, define a kind of control mode based on PLC、transducer and frequency converter technology.3. Make research on modern motor synchronization control strategy, combine several classical synchronization control strategy and working requirement of wheel-rail girder hoister hoisting mechanism, make mathematical modeling, determine the deviation coupling control strategy based on speed difference.4. Design the hardware and software of wheel-rail girder hoister hoisting mechanism control system. To ensure the correctness and enforceability of the design, simulation results of the subject by using PLC laboratory equipments and complete the whole design work of PLC control system.The research result provides the theoretical basis and experimental basis for the design and optimize of wheel-rail girder hoister hoisting mechanism and four motor synchronization control system. It proved that the motor synchronization control strategy based PLC technology has extensive application prospect in wheel-rail girder hoister hoisting mechanism control system.