›› 2016, Vol. 36 ›› Issue (2): 58-.doi: 10.16708/j.cnki.1000-758X.2016.0001

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Thermaldesignandonorbitthermalanalysison YuTu rovermovablecameras

ZHANG  Bing-Qiang, XIANG  Yan-Chao, CHEN  Jian-Xin, SONG  Xin, MA  Ju-Yin   

  1. 1BeijingInstituteofSpacecraftSystemEngineering,Beijing100094,China
    2BeijingKeyLaboratoryofSpaceThermalControlTechnology,Beijing100094,China
  • Received:2015-04-09 Revised:2015-09-01 Online:2016-04-25 Published:2015-09-28

Abstract: InthebrutaltemperatureenvironmentinSinusIridiumwiththerangebetween-180℃to+90℃,itneedstosolvecameraheatdissipationduringlunardaytimeandheatpreservationinmoonlitnightwithoutelectricenergysupplyunderthecomplexrotationof YuTu Rovermast.Besides,theuncertaintyoflunarduststillresultsinriskstothermaldesign.Inordertosolvetheextremehightemperatureproblemindaytime,themastrotatestoanoptimalpositionforheatdissipationandavoidsthecamerabeingtoohot,andtheproportionofpoweronandoffisoptimized.Inextremelylowtemperatureatnight,thethermalcouplingstateofthecameraandtheroverhasbeenchanged;themastisfoldedintothefencetokeepwarmbymeansofheatpreservationsystems.Basedontheanalysisofthecauseofdustsubsidence,themaxsunelevationangleforworkingisrestrictedtoavoidrisksbydust.Accordingtothethermalanalysisresultsandinorbitresults,itcanbeconfirmedthatthehighesttemperaturedecreased15degreesbymethodsoffindingoptimalpositionandoptimizingtheproportionofpoweronandoff.Byfoldingthemastinmoonnight,camerashavesafelyundergonethecoldnight,therefore45WpowergeneratedbyRHUhasbeensaved.Itindicatesthatthecouplingmethodbetweenthermalcontrolandpostureadjustmentcanbeusedtosolvethehighlowtemperatureproblemofmovablecamerasontheplanet′surfacerover,andreducetheroverpowerdemandforRHU.Itcouldprovidethermaldesignreferenceforthefollowoncelestialbodysurfaceexplorations.

Key words: YuTu Rover, navigationcameras, panoramacameras, thermaldesign, onorbitthermalanalysis, lunardust