Design And Research Of The Walking Synchronous Control System On 250 Ton Dual Guide Beam Wheel-type Girder Hoister

With the rapid development of national economy,the number and tonnage requirements of the domestic large frame beam construction equipment are constantly improved.However,the current domestic research and development of girder hoister has been able to meet the basic requirements,some properties cannot be well satisfied.Therefore,it is significant to improve the accuracy of synchronization control for improving the whole properties of domestic girder hoister.In this paper,walking synchronization control system of dual guide beam wheel-type girder hoister which is commonly used in engineering is studied,including control strategy in the electrical system and hydraulic control system.Combined with the current situation at home and abroad for hydraulic walking synchronization control system research and the usage of girder hoister,such as working conditions,walking system of girder hoister is analyzed and researched to ensure the safe operation of girder hoister in the work process.For the existing problems of control methods for dual guide beam wheel-type girder hoister which is commonly used at home and abroad,such as walking synchronization issues of the hydraulic driving system,antiskid control of driving wheels,and so on,are not completely solved or not ideal.On the basis of the currently common speed closed-loop control or pressure,providing the speed-pressure double closed-loop control method,which combined two kinds of control methods and realized the girder hoister synchronous walking on both sides.In order to make the walking system control more precisely,the hydraulic control system applied the electric proportional variable pump controlling electrical proportional variable motor for volume control circuit.Fuzzy PID is adopted as the control strategy considering the nonlinear,time-varying and big outside interference of the research object.Hydraulic system of walking control system is built through AMESim,the part of synchronization control method and fuzzy PID control are built through MATLAB/ Simulink with master-slave synchronous control strategy,co-simulation interface is used to exchange the two parts of data.It is concluded that in the case of light load or full load can still guarantee the synchronization,the synchronization effect has improved significantly and verified the feasibility and advancement of the entire walking control system.Finally,the accuracy of this synchronization control system is verified through the 250 t dual guide beam wheel-type girder hoister conducted experiments.