灌溉的自动控制是一个大惯性、纯滞后、非线性的过程,难以用精确的数学表达式来描述,常规的PID控制方法很难完成这种任务.针对水稻调亏灌溉的控制要求,提出将田间水位或土壤含水率与设定值比较获得差值及其变化率作为系统的输入,水泵及电动阀门是否打开作为系统的输出,建立Fuzzy-PID智能监控系统.试验证明Fuzzy-PID控制能够满足系统的要求,系统有节水降耗、提高水稻质量与产量的优点,具有较高的研究价值.%Automatic control of irrigation is a big inertia, delay, non-linear process, it is difficult to use precise mathematical expression to describe, the conventional PID control is very difficult to complete this task. For control requirements of deficit irrigation of rice, this paper proposes to compare the field level or soil moisture content with the threshold to get the difference and the rate of change as the input of system, switch status of the pumps and electric valves as the output of the system, establish Fuzzy-PID intelligent monitoring system. It is proved by experiment that Fuzzy-PID control meets the system requirement, and the system can save water, reduce energy consumption, improve rice quality and production. So the research of this system is regarded valuable.
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