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