›› 2015, Vol. 35 ›› Issue (3): 50-.doi: 10.3780/j.issn.1000-758X.2015.03.007

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ModelingandAnalysisofCabinAtmosphericEnvironmentalControlSysteminaMannedSpacecraft

LIUWei,CHENLiping,DINGJianwan,XIEGang   

  • Received:2014-10-17 Revised:2015-01-21 Online:2015-06-25 Published:2015-06-25

Abstract: Thegoverningequationsofcomponentsforcabinatmosphericenvironmentalcontrolsysteminmannedspacecraftwerebuilt.ThegeneralmethodofestablishingmodellibraryusingmultidomainunifiedmodelingmethodbasedonModelicawaspresented.Apowerfullibrarywithhighreusability,extensibilityandfeasibilitywasbuiltfortheenvironmentalcontrolsystem.Akindofenvironmentalcontrolsystemincludinganatmospherecontrolandsupplysubsystem(ACSS),atmosphererevitalizationsubsystem(ARS)andatemperatureandhumiditycontrolsubsystem(THCS)wasmodeledtocarryouttheperformanceanalysisandthecontrolstrategystudy.Theinvestigationshowsthatthreesubsystemsarecoupleddeeplyandhaveinfluenceoneachother.TheactivetemperaturecontrolmethodisappropriateforTHCS.Andabettercontrolstrategyofactivetemperatureandhumiditycontrolwasputforwardtoachievemoreeffectivecontrolcapability.Thecrewactivitylevelshouldbeconsideredasavariation,whichhasheavyeffectsonothersubsystems.Theestablishedmodellibraryandanalysisresultsprovideanefficientwaytoimprovethedesignandrunningmanagementofthecabinenvironmentalcontrolsysteminthemannedspacecraft.

Key words: Atmosphericenvironmentalcontrol, Modelica;Objectorientedmodeling, Temperatureandhumiditycontrol, Mannedspacecraft