In order to improve the control accuracy and stability of the mould hydraulic oscillation system,and solve the problems of phase delay and amplitude reduction,the mathematical model of the mould oscillation hydraulic servo system is established using the mechanism modeling method. A control method combining adaptive PI control with load compensation and speed feedforward control is proposed,and a nonlinear simulation model of the system is built. The results show that the established mathematical model is correct,and the displacement tracking error of the input signal is controlled within 3％. The reasonable control of mold vibration effectively improves the surface quality of the casting billet,reduces oscillation marks,and also improves the impact of mold powder consumption on the lubrication of the casting billet.
关键词
液压伺服系统/自适应PI控制/速度前馈控制/负载力补偿
Key words
hydraulic servo system/adaptive PI control/speed feedforward control/load compensation
维普
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