現代溫室分層遞階控制系統(tǒng)的研究與開發(fā).pdf

1、上海大學碩士學位論文現代溫室分層遞階控制系統(tǒng)的研究與開發(fā)姓名：方正申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：張侃諭20070101上海大學碩士學位論文ABSTRACTThedissertationcoverstheworkdonebasedontheprojectofpatentredevelopmentsupportedbytheShanghaiScientificCommittee(projectnumber：05dz52

2、034)GainingallindepthunderstandingoftheUSpatent(U$4916642)“Environmentalcontrolwithmultiplezonecentralprocessormeans”，theauthordevelopsthecomputerizedcontrolsystemforlarge—scalegreenhousebasedonhierarchicalcontrolstrateg

3、yThedissertationpresentsthestructureandthecontroldevicesofthegreenhouseBytakingthefeaturesofthetraditionalgreenhouseautomationsystemintoconsideration，atri—levelhierarchicalcontrolsystemispresentedThecontrolsoftwareisbase

4、donmodularizedstructurewhichCanfulfillallkindsoffunctiOUSatdifferentlevels，includingsystemmanagementandconfigurationatorganization—level，real—timecontrolatharmonylevelanddevicedriveatControl—level，etcByanalyzingthepracti

5、calcontroleffect，itisfoundthatthegreenhousecontrolsystemprovidedexcellentperformanceonstabilityrealizedallthefunctionsandfulfilledtherequirementsofprecisionandreal—timecapabilityThesystemhasaspecialcharacteristicofcommun

6、icationmechanismatdifferentlevel：TheClient／SeverstructureofEthemetisappliedtothecommunicationbetweenorganization—levelandharmonylevel，harmonylevelisconnectedwithcontrol—levelbyCANfieldbusBasedonthefeaturesofgreenhousecon

7、trolsystem，ausefulapplicationprotocolisdeveloped，whichhasagreateffectonthestabilityandefficiencyofcommunicationThetemperaturecontrolisthekeyofgreenhouseenvironmentalcontrolsectionTheprincipiummethodandtestingmethodhavebe

8、enappliedtosetupthemodelofgreenhousetemperatureandwehaverealizedthatthegreenhouseisasystemwitllthecharacteristicsofgreatdelaybigtimeconstant，nonlinearplusandfrequentdisturbanceThedissertationincludestheanalysisofthecontr