基于两时间尺度分解的温室黄瓜环境最优控制的研究

《基于两时间尺度分解的温室黄瓜环境最优控制的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、江苏大学硕士学位论文ABSTRACTFirst，thispaperestablishedagreenbouseenvironmentaldynamicmodelandagreenhousecucumbergrowthanddevelopmentofdynamicmodel，Thegreenhouseenvironmentalmodelincludeairtemperatureingreenhouse，soiltemperature，Carbondioxideconcentration，relativehumidityandaseriesofsub—model．Thegreenh

2、ousecucumbergrowthanddevelopmentofdynamicmodelincludetheassmiliatebuif,leafdryweight，fruitdryweight，photosynthesisandtranspirationrate，thensimulatedandvalidatedbythemodel．Greenhousesystemcanbedividedint0afastsub—problem(environment)andaslowsub—problem(crop)．ThispaperconstructedtheHamiltonian

3、functionofthesub-systems，theobjectivefunctionandsolvedaccordingtotherelevantfunctions．Last，accordingtorequirementsneedingtoaddcarbondioxideingreenhouse，researchfocusedontheoptimalcontrolofgreenhousecarbondioxideandcalculatedtheoptimizesupplyrateofcarbondioxideofeachsystem．Byoptimizingthesupp

4、lyofcarbondioxidenotonlyimprovingtheyieldofgreenhousecucumberbutalsoreducingthecostofgreenhouseenvironmentalcontrol，Theresearchprovidesthetheoreticalbasisandtechnicalsupportinordertoachievethegoalofeconomicoptimalofgreenhousecropproduction．1．TheexperimentwascarriedintheVenlotypeglassgreenhou

5、seofInstituteofAgriculturalEngineering，JiangsuUniversity．JinyouNo．1cucumberbreedbeingchosenasexperimentalmaterials．Theexperimentofgreenhouseenvironmentalandcucumbergrowthanddevelopmentwascarried，providingthenecessarydataforthemodel．2．Modelswereestablished，suchasairtemperatureingreenhouse，soi

6、ltemperature，Carbondioxideconcentration，relativehumidityandtheheatingpipetemperature，Modelsweresimulated，Thesimulationresultswerevalidated，Theresultsistemperature：R2=0．9861，RMSE=0．8；relativehumidityR2=0．803，RMSE=3．727。3．Modelswereestablished，suchasphotosynthesis，transpirationrate，respiration

7、，plantdevelopmentalstage，theassmiliatebuif,leafdryweight，fruitdryweight．Modelsweresimulated，Thesimulationresultswerevalidated，Theresultsisleafdryweight：R2=0．9998，RMSE--0．0601；fruitdryweight：Rz=0．9975，RMSE=0．9596；accumulationoftheassmfliatedaily：R2=