转板式气动数字压力阀设计与仿真研究

随着数字化控制技术的快速发展,直接数字化控制是目前研究较多的一种针对数字/伺服阀控压力系统的控制方法。针对之前"气动阀多采用阀芯阀套结构、模拟量控制,对控制器要求高"的问题,提出了一种转板式气动数字压力阀结构。该气动数字阀采用步进电机加一块特殊形状的转板来实现对气动阀输出气压的控制,采用计算机直接控制方式,建立了气动数字压力阀的数学模型,并对其进行了仿真实验。实验研究结果表明,该数字阀气压输出、输入线性度高,利于开环控制。

Design and simulation study of pneumatic digital pressure valve based on rotating plate

Along with the rapid development of digital control technology,direct digital control technology has been popular studied on control of the digital/servo valve pressure control system.Aiming at the structure of valve＇s core and sleeve,the control mode of analog signals was used in most previous pneumatic valve which needed high requirement of the controller,a pneumatic digital pressure valve with rotating plate＇s structure was presented.A stepping motor assembled with a special shape of the rotating plate was used in the pneumatic digital pressure valve to achieve the goal of controlling the output pressure of the pneumatic digital valve,it worked by computer direct control mode.The mathematical model of the pneumatic digital pressure valve was constructed,and a simulation experiment was carried out,The experiment research results indicate that high linear relationship between the output and input of the pneumatic digital pressure valve can be gotten,which is good to open-loop control.