基于数学模型的阀门驱动气缸位置-压力双环控制技术

Double Loop Control Technology of Valve Driving Cylinder Based on Mathematical Model

为了研制一种适用于船用调节阀开度控制的气动执行机构,设计了以4个两位两通高速开关阀为核心控制元件的气缸位置控制系统,建立系统数学模型,提出一种以驱动力为中间变量的位置-压力双环控制策略,实现气缸位置-压力的解耦设计,根据已知系统参数完成了控制器参数设计,并对控制算法进行仿真研究。研究结果表明,所设计的控制器能够适应系列船用调节阀摩擦力及负载质量的变化,满足调节阀阀口开度控制需求。

In order to develop a pneumatic actuator suitable for the position control of the marine control valve,the cylinder position control system with four two-position two-way high-speed switching valves is designed,the system mathematical model is established,and a position-pressure double-ring control strategy based on the mathematical model is proposed with the driving force as the intermediate variable,so as to realize the cylinder position-pressure decoupling and decoupling design,the controller parameter design according to the known system parameters is completed.The simulation results show that the controller can adapt to the changes in friction and load quality of the series of marine control valves,and meet the control requirements of the valve opening of the regulating valve.