Thermal distortion of over 10 Meter diameter reflectors formed by truss structure

Akihiro Miyasaka, Jin Mitsugi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper describes how an on-board satellite large reflector structure was designed based on the thermal distortion predicted by structural analysis in coordination with thermal estimation. As the reflector consists of many small similar modules, it is possible to simplify the analytical model and the fabrication process. Module size and number are decided by estimating the surface accuracy for a 13 m aperture reflector. The maximum thermal distortion is found to be occurred during eclipses. As the module number increases, the thermal distortion increases. When the antenna system is used in 2.5. G Hz (S frequency bands), total surface accuracy needs to be 2.4 mm RMS (specified value). This requirement is satisfied by a reflector composed of 14 modules; maximum error is 1.6 mm RMS by slight repositioning the reflector.

Original languageEnglish
Title of host publication32nd Thermophysics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9780000000002
Publication statusPublished - 1997
Externally publishedYes
Event32nd Thermophysics Conference, 1997 - Atlanta, United States
Duration: 1997 Jun 231997 Jun 25


Other32nd Thermophysics Conference, 1997
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering
  • Condensed Matter Physics


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