智能气动阀门定位系统动态特性研究

Research on dynamic characteristics of intelligent pneumatic valve positioning system

针对智能气动阀门定位系统数字孪生体的实现,提出一种可精确模拟气动继动器和执行器气室动作机理及气体动态特性的数学模型。在无需气体质量流量计的情况下,通过理论推导及实验在气动继动器动力学模型和等效质量流量模型中可变直径的节流孔板直径之间建立函数关系,对执行器气室多变过程建模,实现定位系统数字孪生体。数字孪生体实际运行测试以及模型仿真和实验对比验证了系统的可靠性。

A mathematical model is proposed for the implementation of the digital twin of the intelligent pneumatic valve positioning system,which can accurately simulate the action mechanism of the pneumatic relay and the actuator gas chamber and the dynamic characteristics of the gas.In the case of no gas mass flow meter,the pneumatic relay dynamics model and the equivalent mass flow model with variable diameter throttle plate are established as a function through theoretical derivation and experiment,the multivariable process of the actuator gas chamber is modeled,and the digital twin of the positioning system is implemented.The system is verified to be reliable through the actual operation test of the digital twin as well as model simulation and experimental comparison.