效益优先的温室光照优化调控模型研究

针对当前温室光照环境调控成本较高的问题,在满足作物生长需求的条件下降低调控成本,提出效益优先的温室光照优化调控模型.通过设计嵌套试验获取温室不同温度、二氧化碳浓度、光照强度组合下的黄瓜光合速率数据,以此环境参数作为输入、光合速率作为输出构建基于最小二乘支持向量机(LS—SVM)的光合速率预测模型;继而采用融合两种不同光...

Research on optimal control model of greenhouse light based on benefit-priority

Due to the high cost of greenhouse lighting control,the optimal control model of greenhouse light with benefit-priority was proposed to reduce the cost of regulation and control under the condition of meeting the needs of crop growth.A nested experiment was designed to collect the photosynthetic rate of Cucumber under different temperature,CO 2 and PPFD in greenhouse.Construction of photosynthetic rate prediction model based on LS-SVM with environment factor as input and photosynthetic rate as output.Then,the optimization algorithm which combines the two different schemes of light optimization is used to build the light optimization model based on BP neural network.The data shows that the theoretical light supply and demand decreased by 22.86%and the photosynthetic rate decreased by 3.71%compared with the control based on the light saturation point.In the validation test,the light supply and demand decreased by 27.47%and the photosynthetic rate decreased by 3.34%,which is 40.69%higher than that of the control group under natural conditions.It is of guiding significance for the precise control of light supplement in greenhouse.