插装式比例节流阀自抗扰控制研究

Research on active disturbance rejection control for cartridge proportional throttle valve

为了克服插装式比例节流阀中流量增益非线性、液动力、摩擦力等多种非线性扰动对阀芯控制性能的影响,提出了三阶自抗扰非线性控制策略。以DN80大流量插装式比例节流阀为研究对象,通过系统辨识的方法建立了较准确的数学模型,并进行了验证。在此基础上设计了三阶自抗扰控制器,并对设计的控制器参数进行了整定优化。通过仿真和实验分别对插装式比例节流阀主阀芯的阶跃响应的快速性和抗干扰特性进行了研究。结果表明:采用自抗扰控制下的主阀芯在阶跃激励下的响应和抗干扰能力方面明显均优于PID控制,系统具有较好的动静态性能和鲁棒性。

In order to overcome the influence of non-linearity,hydrodynamic force,friction force and other nonlinear perturbations on the spool control performance,third- order active disturbance rejection nonlinear control strategies were put forward. For cartridge proportional throttle valve DN80 with large flow rate,its mathematical model was established by the system identification method,and the verification was carried out. On the basis of this,the active disturbance rejection control（ ADRC） strategy was adopted,and the parameters of the active disturbance rejection controller were optimized. Furthermore,the fast speed step response and anti-interference characteristics for main valve core of cartridge proportional throttle valve were researched by simulation and experiment. The research results show that the fast speed step response and anti-interference characteristics of main valve core with ADRC are better than that with PID control,and the system has good steady-state performance and robustness.