Study On Electro-hydraulic Integration System And Its Control-tactic Of Hydraulic Winder

The simple manual operation of proportional pressure reducing valve and the open-loop control of current hydraulic winder can't satisfy the synthetic demand of modern mine production, high efficiency production and work safety. The new and high technology reconstruction of hydraulic winder is necessary.The deficiency of control mode and the deficiency of electro-hydraulic integration status in current hydraulic winder are analyzed in this dissertation. Based on it, the electro-hydraulic velocity servo system is deemed to the key of electro-hydraulic integration system. Original and simplified mathematical models and these simulation models of electro-hydraulic velocity servo system are established. The static and dynamic characteristic of this system is analyzed. Then this system is corrected with simple lag compensation. Ordinary PID control, integral separating PID control, general fuzzy control and fuzzy self-tuning PID control of this system are studied. These controllers are designed. Simulation models are established. The analysis and contrast of simulation result indicates that the fuzzy self-tuning PID control can best satisfy the synthetic demand of electro-hydraulic velocity servo system about hydraulic winder. Within the high-inertia time-varying load pump-control-motor hydraulic test-bed, experimental study of fuzzy self-tuning PID control about this system is carried out.The characteristic of this dissertation lies in that the hydraulic driving system of current hydraulic winder is ameliorated through electro-hydraulic velocity servo system. And then the fuzzy control, the fuzzy self-tuning PID control are used in this system. In conclusion, the key of electro-hydraulic integration in hydraulic winder is electro-hydraulic velocity servo system. The electro-hydraulic velocity servo system without any control tactics or with simple lag compensation can't satisfy both the demand of dynamic precision and stability. Be compared with PID controller and fuzzy controller, fuzzy self-tuning PID controller has better response characteristic, robustness and anti-jamming ability. It could adapt time-varying parameter and nonlinear of this electro-hydraulic velocity servo system and could effectively random interference. Within it this servo system has good dynamic characteristic, stability and tracking performance.