中型温室机电一体化微气候系统控制对象模型

Yelyzaveta Synytsyna, Sofiya Kosmuna
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引用次数: 0

摘要

空气温度和湿度的突然变化会对作物生产产生负面影响。调节温室设施小气候的现代方法被简化为最简单的方法--控制气团的流动和温度。这项工作的目的是创建并测试(验证)一个中型温室小气候简化模型。简化温室模型考虑了在外部因素影响下发生的主要过程(空气交换、质量传递、水分传递、热传递),还考虑了物体的几何和空间特征。每次测试实验只确定一个参数在所有其他参数固定值下的影响。使用 Ansys 软件开发了微气候参数(温度、气流速度和压力)变化的简化参考模型。利用计算机模拟温度场和速度,进行了分析,以确定在控制系统中使用该模型的可能性。分析了气压、气流速度和温度稳定后的小气候特征。研究结果和开发的模型适用于温室机电一体化系统的控制算法,以考虑到参数每天的周期性变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Model of the control object of the mechatronic microclimate system of a medium-sized greenhouse
Sudden changes in air temperature and humidity have a negative impact on crop production. Modern methods of regulating the microclimate of greenhouse facilities are reduced to the simplest one - controlling the flow and temperature of air masses. The aim of this work is to create and test (verify the plausibility) a simplified model of the microclimate of a medium-sized greenhouse. The simplified greenhouse model takes into account the main processes that occur under the influence of external factors (air exchange, mass transfer, moisture transfer, heat transfer), and also takes into account the geometric and spatial characteristics of the object. Each test experiment involves determining the effect of only one parameter at fixed values of all other parameters. A simplified reference model of changes in microclimate parameters (temperature, air velocity and pressure) was developed using Ansys software. Using computer modelling of temperature fields and velocities, an analysis was carried out to determine the possibility of using the model in the control system. The microclimate characteristics were analysed when air pressure, velocity and temperature were stabilised. The results of the study and the developed model are suitable for use in control algorithms for the greenhouse mechatronic system to take into account cyclic daily changes in parameters.
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