フライトデータによるETS-VI搭載大形反射鏡の熱設計評価

抄録

Thermal design verification of large deployable reflectors was estimated by using flight data. The temperatures were recorded from ETS-VI, which was launched on August 28, 1994 using H-II vehicle. The reflector surfaces were coated with white paint which had low absorptivity 0.23 at begin of life (BOL) as well as high emissivity 0.87 at BOL. The back structure of the surface was covered with multi-layer insulation (MLI) blankets to shield the solar energy to the trusses. The maximum and minimum temperatures of the large reflectors were fell within the allowable temperature range. The analysis results obtained by a mathematical model agreed well with the flight data. The maximum temperature difference in the surface of the reflector using the analysis model was also evaluated within the allowable temperature.