摘要
气动调节阀在复杂的流程工业现场环境中有着广泛的应用,但阀杆与密封装置之间的静摩擦现象很普遍,由此引起的调节阀粘滞特性容易导致控制回路振荡,降低控制系统性能。针对气动调节阀的粘滞特性建立了双参数模型,并对典型的流量过程对象进行了仿真,基于仿真产生的调节阀输入输出时间序列,建立了调节阀的MV-0P图。仿真结果表明,MV-0P图所拟合的椭圆直径大小与系统的振荡强度有关。在不同参数下,对系统的振荡强度进行了量化,提出了有针对性的改进措施,并提高了系统的稳定性。
Pneumatic control valves are widely used in complex industrial environment. But the phenomenon of static friction between stem and sealing devices is very common. The pneumatic valve stiction easily leads to oscillations in control loops and reduces the performance of the control system. Two parameters model is established according to the pneumatic valve stiction. The data-driven detection method based on time series is proposed, and then the MV-OP diagram of the pneumatic valve was built. The simulation result shows that the fitting ellipse diameter of the MV-OP figure was related with the strength of the system oscillation. Under different parameters, the improved meas- ures were proposed according to the quantization of oscillation intensity and the stability of the system was improved at the same time.
出处
《计算机仿真》
CSCD
北大核心
2016年第1期239-244,共6页
Computer Simulation
基金
中央高校基本科研业务费专项基金资助(9161714011)
关键词
气动调节阀
粘滞特性
振荡
双参数模型
Pneumatic control valves
Stiction
Oscillation
Double parameters model
