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Selective temperature and humidity control strategy for a chinese solar greenhouse with an event-based approach

文献类型： 外文期刊

作者： Liu, Ran 1 ; Guzman, Jose Luis 1 ; Garcia-Manas, Francisco 1 ; Li, Ming 2 ;

作者机构： 1.Univ Almeria, Dept Informat, CIESOL, ceiA3, Ctra Sacramento S-N, La Canada De San Urbano, Almeria, Spain

2.Beijing Acad Agr & Forestry Sci, Informat Technol Res Ctr, Beijing, Peoples R China

3.Minist Agr & Rural Affairs, Natl Engn Res Ctr Informat Technol Agr, Beijing, Peoples R China

4.Minist Agr & Rural Affairs, Natl Engn Lab Agriprod Qual Traceabil, Beijing, Peoples R China

5.Minist Agr & Rural Affairs, China Meteorol Adm, Meteorol Serv Ctr Urban Agr, Beijing, Peoples R China

6.Minist Agr, Key Lab Agriinformat, Beijing, Peoples R China

关键词： Selective control; PI control; Event-based control; Agriculture; Greenhouses

期刊名称：REVISTA IBEROAMERICANA DE AUTOMATICA E INFORMATICA INDUSTRIAL （ 影响因子：1.5； 五年影响因子：1.0 ）

ISSN： 1697-7912

年卷期： 2023 年 20 卷 2 期

页码：

收录情况： SCI

摘要： This paper introduces an application of a selective temperature and humidity control scheme for chinese solar greenhouses, which are the most widely used in the northern provinces of China. Firstly, a PI controller for temperature is studied with an event-based approach. After the evaluation of different event-generator thresholds, an optimum value is selected which significantly reduces the number of vent movements by 43.8%, while only increasing the temperature error by 1.13%. Secondly, a controller for relative humidity and another controller for absolute humidity were implemented. The results show that the controller for relative humidity performs adequately when the set-point is not high. However, the control action is deteriorated when the set-point is over 70%. The absolute humidity control allows to regulate the humidity for references of any value, but with less control precision. Finally, through a simulation study, the effectiveness is demonstrated for a selective temperature control strategy with a humidity priority control scheme. This control strategy keeps the relative humidity below 80% while controlling the temperature to the set-point, preventing high humidity from damaging the crop.

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