基于模糊免疫PID的Smith预估器在温室控制中的应用研究

针对温室环境控制中被控对象温度的大迟延和模型参数的不确定性,结合传统Sm ith预估控制方法和模糊免疫PID控制方法,设计了基于模糊免疫PID的Sm ith预估控制器。通过对温室控制系统的数学模型进行仿真,结果表明,所设计的控制器抗干扰能力强,调节速度快,超调量小,适用于类似温室温度控制的、缺乏精确数学模型且参数变化的大迟延工业过程。

Application of the Smith Predictor with Fuzzy Immune PID in Greenhouse Control

Aiming at the large time delay and parameter uncertainty of temparature in greenhouse environment,and combined with the structure of Smith predictor and fuzzy mimune PID contrloller,the Smith predictor with fuzzy immune PID controller is designed.By the simulation of mathematical model in greenhouse control system,results show that the control system not only has a strong anti-interference capability,but also has the characteristic of rapid adjustment and small overshoot.It suits for the large lag time industrial process similar to temperature control which lack of accurate mathematical model and varied parameters.