温室节水灌溉系统模糊控制器设计及 MATLAB 仿真

摘要

Because of the characteristics of the greenhouse environment is complex and difficult to establish accurate mathematical model , a fuzzy control greenhouse irrigation system is designed , in order to achieve the automatic ,real-time and proper amount irrigation of greenhouse crop .The paper detailed introduce the design of fuzzy controller .The control-ler takes the soil humidity offset and changing rate as inputs , the time of irritation was used as output .Finally , the con-trol system was simulated by Matlab and the drip irritation experiment was made in laboratory .Simulation results and pre-liminary tests show the system can control the deviation between soil humidity and the target humidity about 1%, and meet the requirements for the control of soil humidity , can achieve greenhouse automatic irrigation .%为实现对温室作物用水自动、适时与适量的灌溉，针对温室环境复杂且很难建立精确数学模型的特点，设计了基于模糊控制的温室节水灌溉系统，并介绍了模糊控制器的设计。该控制器将土壤湿度偏差及偏差变化率作为输入量，灌溉时间长度作为输出量，分别应用 MATLAB 对控制系统进行仿真实验和在实验室进行滴灌实验。仿真结果和初步试验结果表明：系统可控制土壤湿度与设定目标湿度之间的偏差在1％左右，可以满足对土壤湿度控制的要求，能够实现温室的自动灌溉。