基于专家-模糊PID控制的松散回潮出口水分控制系统设计

The control system of the outlet moisture content of the looseness and moisture regain based on expert-fuzzy PID control

摘要:

松散回潮属于大时滞系统，其出口烟叶水分控制所采用的带前馈-串级控制达不到理想的控制效果。在生产过程中需要根据经验手动修改加水系数，并没有真正实现完全自动化控制。提出了一种将专家系统、模糊推理和常规PID控制相互结合的新方法实现了松散回朝出口水分的控制，利用专家系统对加水系数进行自动决策；采用模糊推理方法分别对前室加水控制器与后室水分控制器的PID参数进行了在线自适应整定，实现了松散回潮出口水分控制的全自动化，提高了松散回潮出口水分的稳定性与精确性。

Abstract:

The looseness and moisture regain belongs to large time delay system, the feed-cascade control used for the moisture content control of the outlet tobacco leaves can not achieve ideal control effect. In the process of production, it is necessary to manually modify the water adding coefficient according to experience, and do not truly realize complete automation control. A new method of combining expert system, fuzzy inference and PID control is proposed to control the outlet moisture content of the looseness and moisture regain. The expert system is used to make decision on water adding coefficient automatically, and the fuzzy inference method is used to tune the PID parameters of the front chamber water controller and the back chamber moisture controller respectively online. The full automatization control of the outlet moisture content of the looseness and moisture regain is realized, and the stability and accuracy of the outlet moisture content of the looseness and moisture regain are improved.