Far infrared spectroscopy telescope (FIRST) inflatable thermal shield, phase 1

Details Far infrared spectroscopy telescope (FIRST) inflatable thermal shield, phase 1 Far infrared spectroscopy telescope (FIRST) inflatable thermal shield, phase 1

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987stin...8830552k&link_type=abstract

Final Report Contraves Corp., Zurich (Switzerland). Space Dept.

Astronomy and Astrophysics

Astronomy

Astronomical Satellites, Heat Shielding, Inflatable Structures, Infrared Telescopes, Satellite Temperature, Space Erectable Structures, Satellite Design, Space Environment Simulation, Structural Analysis, Thermal Analysis

Scientific paper

Inflatable space rigidized structures (ISRS) were assessed for the FIRST satellite thermal shield. The baseline shield configuration, the so called obliquely cut cylindrical shield configuration, has a diameter of 10 m, a maximum height of 10 m, and a cut angle of 30 deg. This shield consists of an ISRS skeleton of tubes of diameter 0.45 m carrying the thermal control layers. The stringent requirements on the thermal control can be met by a 6-layer multilayer insulation, consisting of 2 layers of SAK (1 Mil) and 4-layers of DAM (0.25 Mil). Using the BF3 catalyst, the ISRS structure can be cured in 3 preselected positions with respect to Sun within 9 hr. Curing without catalyst is also possible, but in this case a 90 deg tilt of the satellite and longer cure times (24 hr) must be faced. The first eigenfrequency of the baseline thermal shield in deployed configuration is 2.15 Hz, thus the stiffness requirement is fulfilled. The thermal shield can survive the thermal stresses introduced during the worst operational case. The total mass lies comfortably within the specified limit of 220 kg. The shield can be well stowed in the allowable volume of the Ariane 4 shroud.

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