›› 2017, Vol. 37 ›› Issue (5): 47-.doi: 10.16708/j.cnki.1000-758X.2017.0075

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AmethodofimagediagnosisforinorbitHallthrusterplume

 HU  Jun-Feng, YANG  Xin-Yong, ZHONG  Xiao-Qing, HUANG  Tao, WEI  Li-Qiu, YU  Da-Ren   

  1. 1HarbinInstituteofTechnology,InstituteofAdvancedPower,Harbin150001,China
    2InstituteofTelecommunicationSatellite,ChinaAcademyofSpaceTechnology,Beijing100094,China
  • Received:2017-05-04 Revised:2017-08-21 Online:2017-10-25 Published:2017-09-12

Abstract: AnimagediagnosismethodbasedonthespectrumdiagnosiswasproposedtofacilitatetheinorbitdiagnosismeasurementofHallthrusterplume.Firstly,theRGBdatareflectingthespectralradiationintensityofdifferentwavelengthrangewasextractedfromtheplumeimagephotographedbythecamera.Basedontheanalysisofthecameraimagingprinciple,thecorrespondencebetweentheimagegrayvalueandspectralintensitywasdeduced.Thentheplumeimagediagnosismodelwasestablishedcombinedwiththespectralcollisionradiationmodel.Theexperimentalresultsshowthatthedistributionoftheelectrontemperatureandiondensityintheplumeregioncalculatedbytheimagediagnosismethodisinagreementwiththeresultsoftheprobemeasurement.Therelativeuncertaintyofthecalculatedresultsisabout20%and15%.Itisfurtherprovedthatthediagnosismethod,whichhasmoderateprecisionandhighreliability,issuitablefortheinorbitdiagnosismeasurementofHallthrusterplumeparameters.

Key words: Hallthruster, plume, imagediagnosis, spectralradiationintensity, grayvalue