| Electro-hydraulic closed loop position synchronism is widely used in various fields,whether synchronous performance is good or not plays an important part on productquality and equipment safety. So the research on Electro-hydraulic closed loop positionsynchronous control algorithm is of great significance.In this paper, the hydraulic synchronous control system which is consist of twoservo proportional valve controlled symmetric cylinder is the research object and thetwo axis position closed loop synchronous control algorithm was studied. Theadvantages and disadvantages of the commonly used synchronous control strategy isanalyzed and summarized. Variable gain synchronous control algorithm is presented; PIvariable gain synchronization control algorithm and PIDNN variable gainsynchronization control algorithm is designed.In order to the feasibility of the algorithm, the simulation interface and program ofElectro-hydraulic closed loop position synchronism is designed using LabVIEWsoftware. PI variable gain synchronization，PIDNN variable gain synchronization andPIDNN variable gain synchronization without learning ability are simulated using thesimulation program under different types of position command signal，different types ofload, different synchronization principle and different load characteristics. To verify thesynchronous control algorithm better than the conventional serial and parallelsynchronization, serial and parallel synchronization are included in synchronoussimulation for contrasting analysis. Conclusion drawing from synchronizationsimulation is that variable gain synchronous control algorithm is not suitable for eachsynchronization system that has larger partial load.To make up for the inadequacy of algorithm, Composite synchronous controlstrategy is synchronous control strategy on variable gain and parallel is presented, thecontrol strategy combines the advantages of variable gain synchronism and parallelsynchronism. Simulation shows that the composite synchronism strategy has highsynchronization precision, short adjustment time, and good synchronizationperformance under partial load. |
