Computer Science – Performance
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991secs.conf..785c&link_type=abstract
In ESA, 4th European Symposium on Space Environmental Control Systems, Volume 2 p 785-790 (SEE N92-26950 17-54)
Computer Science
Performance
Mathematical Models, Multilayer Insulation, Soho Mission, Space Probes, Systems Engineering, Temperature Control, Thermal Analysis, Thermal Simulation, Ultraviolet Spectrometers, Extreme Ultraviolet Radiation, Performance Tests, Reliability, Solar Radiation, Ultraviolet Telescopes
Scientific paper
The experiment, Solar Ultraviolet Measurements of Emitted Radiation (SUMER), will observe the solar atmosphere on board the SOHO spaceprobe. The telescope/spectrometer operates in the far UV spectral range with excellent spatial and spectral resolution. The thermal control of SUMER is a delicate task due to extreme thermal requirements and unfavorable boundary conditions. The optical fidelity requires extremely stable mechanical conditions free from dilatation or distortion. Consequently, the operational temperature range is very small and gradients within the structure can not be tolerated. This task is complicated by limitations of heater power and cleanliness requirements dictating the material selection. Internal heat sources (dissipation, absorbed solar flux, and heater power) are small compared to the large surface area. Thus, the long term stability of multilayer insulation performance is an important factor of the thermal design. A detailed thermal mathematical model was established and an exhaustive thermal analysis was performed in several iterations to identify critical areas and to define a reliable thermal design by reducing the uncertainties.
Curdt Werner
Rathjen H.
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