Abstract:The dead zone of an electro-hydraulic control valve is the major reason resulting in the hysteresis of the mixed-gas pressure regulation. The generation of the valve dead zone was analyzed. The dead-zone compensation mechanism with high-frequency dither signals acting on the actuator of the control valve was discussed. By use of the AMESim simulation tool, the physical model of the dead-zone compensation for the electro-hydraulic control valve was established, and the model was verified by the experiments. Based on the physical model, the dither-signal parameters that affect the compensation performance were investigated. The results show that the adverse effects of the valve dead zone are obviously reduced by adding dither signals to the actuator to keep it vibrating persistently, the dynamic response characteristics of the control valve are improved, and the dead-zone compensation is obtained.
谢玉东;王 勇;刘延俊. 大型调节阀死区的颤振补偿研究[J]. , 2010, 29(1): 166-169.
XIE Yudong;WANG Yong;LIU Yanjun. DEAD ZONE COMPENSATION FOR LARGE-SIZE CONTROL VALVE BASED ON DITHER EFFECT. , 2010, 29(1): 166-169.