模糊PI 控制在交变湿热控制中的应用

针对多循环交变湿热的温湿度控制，本文介绍了一种交变湿热控制的新方法，该方法把模糊控制和常规PID 控制结合起来，采用双模态分段控制和补偿解耦设计出温湿度控制系统，并在西门子S7-300系列PLC 上加以实现。通过应用可知，该方法对多变量、强耦合、大惯性对象的控制是非常有效的，具有超调小，调节迅速和上升时间短特点，具有很好的鲁棒性。
关键词：模糊控制；PID 控制；补偿解耦；PLC
Abstract: According to the control of the temperature and humidity multi-variable system, this paper presents a new method to control temperature and humidity. The method combines fuzzy control technology with PID algorithm and applies the two-model control method and fuzzy discoupling to design a control system of temperature and humidity and PLC S7-300 is used as the control platform. Application result shows that the control system is effect in controlling the plant with multi-variable, highly-coup ling, long-dead-time and has ideal
characteristics of small overshoot, fast regulation and short climbing time, and good robustness.
Key words: fuzzy control; PID control; compensate discoupling