摘要
针对传统水肥粗放式灌溉利用率低、土壤灌溉系统具有非线性、时滞性等特点,设计了一种基于模糊PID控制的水肥灌溉控制系统。系统实时采集土壤湿度、肥料浓度,根据理想的湿度、肥液浓度值配置合适浓度的水肥溶液,PLC控制中心基于模糊PID控制算法对作物进行适时、适量的水肥灌溉,自动调节土壤湿度、肥料浓度。经过仿真,结果显示相比于单独的模糊控制与PID控制,模糊PID控制具有更好的控制精度与响应速度,系统能很好地将土壤湿度和土壤中肥料浓度值控制在目标范围内。经过实际测试,系统可以有效提高水肥的利用效率,降低生产成本,提高了农业的自动化水平。
In view of the low utilization rate of traditional extensive water and fertilizer irrigation and the characteristics of nonlinear and time-delay found in soil irrigation systems,this paper designed a water and fertilizer irrigation control system based on fuzzy PID control.The system measures real-time soil moisture and fertilizer concentration and integrates the ideal moisture and fertilizer concentration values to determine the appropriate concentration of water and fertilizer solution.The PLC control center implements timely and appropriate water and fertilizer irrigation for crops based on the fuzzy PID control algorithm,and automatically adjusts soil moisture and fertilizer concentration.Simulation results indicate that,compared to fuzzy control and PID control alone,fuzzy PID control offers superior control accuracy and response speed.The system effectively maintains soil moisture within the target range and monitors the soil fertilizer concentration value,ensuring it remains within the optimal range for crop growth.Through practical testing,the system has been shown to significantly enhance the utilization efficiency of water and fertilizer,reduce the production cost,and advance agriculture automation.
作者
汤春球
刘凤来
余自良
TANG Chunqiu;LIU Fenglai;YU Ziliang(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)
