The Mechanism And Application Research Of Electro-hydraulic Proportional Synchronous Control Based On Graph Theory

Multiple actuator synchronization control is the important technology and difficult problem of the fluid transmission and control. Accuracy of synchronization control size to some extent determines the performance advantages and disadvantages of multi-element device or system. Copper anode synchronous lifting equipment is an important part of the preparation of copper anodes for electrolytic refining unit, used to receive or complete block of copper anode lifting work, it has loads of features. So requesting synchronization control of high precision to ensure its actions stability and reliability. The hydraulic synchronous control of itself is a certain degree of difficulty, and the lifting device loads much larger, proning to eccentric load, which is difficult to maintain synchronization with accuracy. Therefore, this paper has a good theoretical and practical engineering significance. The paper has analyzed the copper anodes synchronization lifting installment principle of work, according to the actual technological requirement and the production demand, designed has used the copper anodes synchronization lifting installment mechanism which the hydraulic cylinder actuated. The device uses two hydraulic cylinders combined with four steering column structure, lifting weight of 6.5 tons.This paper introduces the research status and development of synchronous control technology at home and abroad of electro-hydraulic proportional control technology and hydraulic. Introduced the concept of synchronization control precision, from the theoretical analysis of the factors affecting the accuracy of the synchronization control.Using electro-hydraulic proportional control design of hydraulic synchronous lifting device control system, the system pressure 16Mpa, flow 30L/min, using an electro-hydraulic proportional and directional valve as a control element.Papers study the graph theory and combined it with the hydraulic system modeling, the model can calculate for the flow of each node in hydraulic system, to package the calculation model into a simulink module, and applied to the anode plate synchronous lifting control system,provides a new method for the hydraulic system control optimization.To analysis the various of principle and of control strategy,according to the copper anodes synchronization lifting device control system with delay, the mathematical model is not accurate, the characteristics of large steady state error,so select the Smith Fuzzy PID control to the electro-hydraulic proportional control system of the device. On the basis of the copper anodes synchronization lifting device operating parameters, the use of Simulink simulation software in Matlab, to the entire control system simulation and research. According to the simulation results, the system reaches steady state in 1.5s after adding the control strategy, response is very, the response time is 1.2s. The synchronization precision has achieved the anticipated target in 0.01mm,the quality of synchronous control system has greatly improved, meet the copper anodes synchronization lifting control production requirements.Finally, design of the the preliminary electro-hydraulic synchronous lifting platform test platform,to providing a basis for further research in experiment; and make experiment in State Key Laboratory of Shield Machine and Boring Technology to proves the correctness of the research.