温室温湿度的反馈前馈线性化解耦控制  

Feedback feedforward linear decoupling control of temperature and humidity in greenhouse

作　　者：程文锋[1,2] 杨祥龙[1] 王立人[1] 

机构地区：[1]浙江大学生物系统工程与食品科学学院,杭州310029 [2]浙江机电职业技术学院,杭州310053

出　　处：《东南大学学报（自然科学版）》2012年第A01期5-10,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金青年科学基金资助项目(61104094)

摘　　要：为了改善传统温室各环境因子的控制效果,研究了实用的非线性温室系统反馈前馈线性化解耦算法.采用该算法将非线性的多输入多输出系统变成2个独立的单输入单输出一阶线性系统,解除了温度湿度等环境因子间的强耦合关系.求出了使温室动态质能平衡方程完全线性化解耦的温度和湿度调控量,并在合理的温湿度目标值下进行了温湿度解耦控制的仿真实验,仿真实验表明:若环境因子目标设定值在合理可控范围内,温室系统温度和湿度双因子协调控制能取得很好的跟随效果,消除了温度和湿度间的耦合,提高了温度湿度控制精度,从而能有效减小能耗,提高温室生产综合效益.The control effect of environmental factors in traditional greenhouse is improved by the proposed practical feedback feedforward linearization and decoupling algorithm. Using this algo rithm, the nonlinear multipleinput multipleoutput system is transformed into two independent single input singleoutput firstorder linear systems. Strong coupling between temperature, humidity and other environmental factors is removed. The temperature and humidity control law that make the dy namic massenergy balance equations of greenhouse system completely decoupled is easily calculated by this method, and a simulation experiment is conducted under the reasonable temperature and hu midity targeted Value. The simulation results show that good effect can be achieved through the two factor coordinated control of greenhouse temperature and humidity if the target value are set manage able. The coupling between temperature and humidity is eliminated and control precision is im proved, so energy consumption in greenhouse can be effectively reduced and comprehensive benefits can be enhanced.

关 键 词：温室 温湿度 反馈前馈 解耦控制 

分 类 号：S625.5[农业科学—园艺学] TP273.5[自动化与计算机技术—检测技术与自动化装置]