论文部分内容阅读
控制阀粘滞特性在工业过程中非常普遍,本文针对控制阀粘滞特性而引起的回路振荡现象,提出了1种改进的PI控制方法,在一定的误差范围内只用比例控制从而消除振荡,而在误差比较大时采用了自适应PI控制来提高系统性能。同时将改进的PI控制方法转换成模糊控制经验,采用模糊控制克服回路中控制阀粘滞特性,同样达到消除误差的目的。最后在Matlab Simulink平台上,通过设计S函数,实现了控制阀粘滞特性模块和改进的PI控制器,使用模糊控制工具箱实现了模糊控制器的设计,在此基础上分析了在扰动存在的情况下2种控制方法的有效性。
The control valve viscous characteristic is very common in the industrial process. In this paper, an improved PI control method is proposed for the ring oscillation caused by the viscous characteristics of the control valve. Only a proportional control is used to eliminate the oscillation within a certain error range, In the larger error when using adaptive PI control to improve system performance. At the same time, the improved PI control method is transformed into the fuzzy control experience, and the fuzzy control is used to overcome the viscous characteristics of the control valve in the circuit, so as to eliminate the error as well. Finally, on the Matlab Simulink platform, through the design of S function, the control valve viscous characteristic module and the improved PI controller are realized. The design of the fuzzy controller is realized by the fuzzy control toolbox. Based on the analysis, The effectiveness of the two control methods in the case.