温室温湿度耦合控制方法研究  

Research on Temperature and Humidity Coupling Control Method of Greenhouse

作　　者：高立婷 戴思慧[2] 徐新明 周娟[1] 李明 Gao Liting;Dai Sihui;Xu Xinming;Zhou Juan;Li Ming(Hunan Agricultural University,College of Mechanical and Electrical Engineering,Changsha 410128,China;Hunan Agricultural University,College of Horticulture and Garden,Changsha 410128,China;Agricultural Equipment Research Center,Hunan Academy of Agricultural Sciences,Changsha 410125,China)

机构地区：[1]湖南农业大学机电工程学院,长沙410128 [2]湖南农业大学园艺园林学院,长沙410128 [3]湖南省农业科学院农业装备研究中心,长沙410125

出　　处：《农机化研究》2021年第12期24-30,共7页Journal of Agricultural Mechanization Research

基　　金：国家西甜瓜产业技术体系专项(CARS-25);国家重点研发计划项目(2018YFD0200800)。

摘　　要：为解决温室温度、湿度环境精准控制问题,基于PID算法并结合温度、湿度热力学分析,提出了一种温室温湿度耦合控制方法。通过实验结合参数辨识方法建立温室温度、湿度的数学模型;从热力学角度分析温度与湿度之间存在的耦合关系,得出温湿度耦合函数;将耦合函数作为温湿度之间的影响关系添加到基于PID算法的控制模型中,最终建立了基于PID算法的温湿度耦合控制模型。实验结果表明:加入温湿度耦合关系后,耦合控制相较于无耦合控制方法,温度控制与湿度控制系统的系统稳态时间分别减少73.3%和50%,系统稳态误差均为0,系统更加稳定准确。温湿度独立控制方法很难实现温室温度与湿度的协调准确控制,而采用耦合控制方法能够大幅度提高控制系统的稳定性、快速性及准确性,实现了温室温湿度的精准控制,从而提高了温室作物的生产品质。In order to solve the problem of precise control of the temperature and humidity in greenhouse, based on the PID algorithm and the thermodynamic analysis of temperature and humidity, a coupling control method of temperature and humidity in greenhouse was proposed. The mathematical model of greenhouse temperature and humidity was established through experiments and parameter identification methods;the temperature-humidity coupling function was obtained by analyzing the coupling relationship between temperature and humidity from the perspective of thermodynamics. Finally, the coupling function, as the influence between temperature and humidity each other, was added to the control model based on PID algorithm and temperature-humidity coupling control model was established. After temperature and humidity coupling was added, compared with the uncoupled control method, the steady state time of temperature and humidity control systems were reduced by 73.3% and 50% respectively, system steady-state error is 0 and stability of system was better. The verification results showed that the independent temperature and humidity control method was difficult to achieve the coordinated control of the temperature and humidity in the greenhouse, and the coupling control method could improve the stability, speed and accuracy of the control system to a certain extent, more accurate control of temperature and humidity in the greenhouse could improve the quality of greenhouse crops.

关 键 词：温室 温湿度 PID 热力学 耦合控制 

分 类 号：S625.51[农业科学—园艺学]