| Forging hydraulic press which is an important symbol of one of measuring country’slevel of machinery and defense industry strength，is an heavy machinery equipment in themachinery manufacturing industry. Hydraulic water press plays an important role in manylarge equipment fields while the traditional water control water drive mode can’t meet thecontrol accuracy and the automation level. The 60 MN free forging hydraulic press has thefast response, high control accuracy by applying electro-hydraulic position proportionalcontrol system. It’s able to realize the quick forging, improve production efficiency andthe work environment. Using digital simulation method to analysis the dynamic and staticcharacteristics of the system has important theoretical and practical value.Relying on the 60 MN free forging hydraulic press electro-hydraulic proportionalcontrol system, this paper complete the following aspects with the system simulationsoftware MATLAB/Simulink:Firstly, use the mechanism method to model the 60 MN free forging hydraulic presselectro-hydraulic proportional control system’s key components including hydraulicproportional valve, accumulator, hydraulic power institutes, and the fluid power in the fastin the forging process.Secondly, analyze the system with the traditional PID controller, and try to make thesystem have good dynamic response characteristics. In order to improve the controlprecision and external load disturbance robustness, a MRAC controller was designed andthe simulation results showed that the MRAC controller had better performance and madethe system a kind of adaptability.Thirdly, in order to test the PID and the MRAC controller, the electro-hydraulicproportional valve controlling cylinder experimental platform was built .According to theexperimental data, the simulation model and MRAC controller was correct. |
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