模糊自适应Smith预估器在温室控制中的应用研究

该文以蒸汽管道为对象,采用机理分析法对温室加温时的温度对象进行分析,得到室内温度模型和蒸汽管道模型。采用模糊控制技术,组成温室温度的模糊控制系统。针对温室系统大延时滞后的特点,采用自适应Sm ith预估器对温室模糊控制系统进行补偿,组成模糊自适应Sm ith预估控制系统。运用MATLAB软件的S imu link建立温室控制系统的仿真模型,并分别用常规模糊控制技术和模糊自适应Sm ith预估控制技术对温室加温进行仿真试验,仿真结果表明在温室加温的模糊控制系统中增加自适应Sm ith预估器后,系统具有更强的适应能力,系统的动态特性都有了较大的改善。

Application of Fuzzy Adaptive Smith Predictor in Greenhouse Control

This paper considers steam pipe as the modeling object,the temperature object is analyzed by using the principium method when the heating system is used in the greenhouse,and the models of greenhouse temperature and steam pipe temperature are set up.Using fuzzy control strategy,the fuzzy control system of greenhouse temperature is built.Greenhouse fuzzy control system is compensated by adaptive Smith predictor because of the characteristic of time-delay,time varying of greenhouse,and the fuzzy adaptive Smith pre-estimate control system is set up.The simulation model of greenhouse control system is set up by using SIMULINK in MATLAB,and the paper uses general fuzzy control strategy,fuzzy adaptive Smith pre-estimate control strategy respectively to simulate greenhouse heating system.It is proved that fuzzy adaptive Smith pre-estimate method is better than the general fuzzy control method in the adaptability capability and the dynamic and static characteristics.