| The synchronous control of the hydraulic system was widely used in the production,installation and handling of heavy and large components or equipment.This paper studied the synchronous control of the hydraulic system with a 16,000-ton offshore floating platform.In this hydraulic system,there were four power units,which were typical working conditions where multiple power points drave the movement of the same load,which required good synchronization between the power points.First of all,the construction method of the 16000-ton offshore floating support installation platform mainly included processes such as synchronous jacking,rapid falling,and active load rapid transfer.The hydraulic system was designed and calculated according to the construction method.It used a high-flow unloading scheme that released pressure first and then released the flow.Then,the main components of the hydraulic system was selected,the simulation modeling of components and systems were carried out.Secondly,a longitudinal comparison study of three control strategies for the hydraulic system of the 16000-ton offshore floating support installation platform were master-slave control,equivalent control and deviation coupling control.At the same time,in these three control strategies,a composite fuzzy PID and an integral separation PID based on the composite fuzzy control were used to conduct a horizontal comparison study.According to the results of the joint simulation performed by MATLAB and AMESim,it could be found that in the longitudinal comparison,the synchronization accuracy of the deviation coupling control strategy was 12 mm,the stabilization time was 525 s and the overshoot was 14 mm,which was more ideal than the other two control strategies.In the horizontal comparison study,the use of integral separation composite fuzzy PID control was also better than the composite fuzzy PID,and the error values were reduced by 7mm,so it proved that the deviation-coupled integral separation composite fuzzy PID synchronous control strategy proposed in this paper was ideal synchronize control results.Finally,because China did not have a complete set of 16000-ton offshore floating support installation platform and the price was high,this paper designed a scale-down model based on Newton's number similarity criterion,and simulates and tested the model system.The test results showed that during the full-stroke synchronous movement of the scale model machine's 192 mm,the maximum error value was 2.18 mm and the synchronization accuracy reached 98%,it had a good control result.At the same time,the research method was also used for hydraulic synchronization of large components Jacking research provided a new idea. |
PDF Full Text Request