摘要
温室小气候具有非线性、强耦合、强干扰、时变等特点。基于热力学和传热学原理,以物质和能量守恒为原则,考虑室外温度、太阳辐射强度、风速和室内湿度等相关因素,建立了以PC板为主要材料的温室温度动态数学模型,采用迭代算法对数学模型中不易确定的参数(叶面积指数)进行了参数估计。以安徽农业大学农业试验园的PC板温室为例,基于Matlab平台,对该温室的数学模型进行了仿真验证。试验结果表明,该温室动态模型的计算输出与实测数据基本吻合,具有较好的通用性。
Greenhouse has the characters of nonlinear,severe coupling,greatly distraction by noise,time-varying,etc.Based on the thermodynamics and heat transfer theory,a temperature dynamic mathematical model conceding the relative factors such as temperature outside,sun radiation intensity,wind speed and indoor humidity is proposed of PC board greenhouse with the principle of matter and energy conservation.By using iterative algorithm,the parameters which are difficult to determine are estimated.In the PC board greenhouse of Anhui Agricultural University,the mathematical model is simulated and analyzed by using MATLAB.The test results show that the calculating output of dynamic model is consistent with measured data.So the mathematic model has better versatility.
出处
《农业网络信息》
2010年第9期21-24,共4页
Agriculture Network Information
基金
国家八六三项目(编号2006AA10Z249)
关键词
温室小气候
温度
动态数学模型
仿真
greenhouse microclimate
temperature
dynamic mathematical model
simulation
