›› 2015, Vol. 35 ›› Issue (6): 48-.doi: 10.3780/j.issn.1000-758X.2015.06.006

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CharacteristicsAnalysisofaOnewayMicroExpansionTypeHeatSwitchforSpaceApplication

MA  Ming-Chao, GUO  Liang, ZHANG  Xu-Sheng, WU  Qing-Wen   

  1. (1ChangchunInstituteofOptics,FineMechanicsandphysics,ChineseAcademyofScience,Changchun130033)
    (2GraduateUniversityofChineseAcademyofScience,Beijing100049)
  • Received:2015-04-28 Revised:2015-07-24 Online:2015-12-25 Published:2015-12-25

Abstract: Inordertoimprovethetemperaturecontrolprecisionofthedetectorandother spacecraftandreducethetemperaturefluctuationaccuracy,aonewaymicroexpansiontypeheatswitchwasdesignedbasedonthermalexpansionandcontractionofmetal.Thecharacterizationparameterwasgettoanalysisthetwodimensionalsteadystatethermalmodeling. Then, anexperimental
setupwasdesignedtosimulatetheactualworkingconditionsofthermalswitch,andswitchoperatingstatusandrelatedperformanceparametersweremeasuredunderdifferentheatpower.Whenthepowerisupto04W,disconnectedresistanceis23046K/W.Thepowerisupto30W,theclosedthermalresistanceofswitchis03022K/W,andswitchratiois7626.Theresultsshowntheexperimentdataareingoodagreementwiththetheoreticalcalculations.

Key words: Thermalcontrol, Onewaymicroexpansion;Heatswitch, Characterizationparameters, Temperaturechange, Spacecraft