Fuzzy-PID复合控制在温室节水灌溉中的应用  

Application of fuzzy-PID compound control in greenhouse water saving irrigation

作　　者：邵鹏飞[1] 曹江涛[1] 桑红[1] 王志恒[1] 

机构地区：[1]辽宁石油化工大学信息与控制工程学院,辽宁抚顺113001

出　　处：《传感器与微系统》2016年第8期144-147,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(61203021)

摘　　要：为解决温室节水灌溉的需求,综合考虑温室环境因子对灌溉量的影响,通过系统辨识的方法,建立被控对象土壤湿度的数学模型。针对湿度控制大滞后惯性环节的特点,设计了一种Fuzzy-PID复合控制的方法。该方法将模糊控制器和PID控制器并行结合,并采用梯形隶属函数的模糊切换算法进行两者的切换,实现两种控制方法的优势互补。实验仿真结果表明:Fuzzy-PID复合控制响应时间短、超调量小、稳态过程没有振荡,不仅具有较好的动态性能,而且具有比较理想的稳态品质,适用于温室节水灌溉控制。In order to solve the needs of water saving irrigation in greenhouse,considering the effects of environmental factors in greenhouse on irrigation amount,establish mathematical model for soil humidity of the controlled object by using system identification method. Aiming at characteristics of humidity control lag inertia link,a method of fuzzy-PID hybrid control is designed. The method combines fuzzy controller with PID controller,and fuzzy switching algorithm based on trapezoidal membership function is used to switch between the two controlling methods,which realizes complementary advantages. Simulation results show that the fuzzy-PID hybrid control has short response time,small overshoot,no oscillations in steady state,and so on. Also it not only has good dynamic performance,but also has ideal steady quality,which is suitable for greenhouse water-saving irrigation control.

关 键 词：节水灌溉 土壤湿度 灌溉量 数学模型 FUZZY-PID复合控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]