Accuracy of Extrapolation of Equilibrium Temperatures of Transient Fields of Temperature with Two Different Mathematical Approaches

Paper #:
  • 951696

Published:
  • 1995-07-01
Citation:
Eckert, K. and Pleißner, F., "Accuracy of Extrapolation of Equilibrium Temperatures of Transient Fields of Temperature with Two Different Mathematical Approaches," SAE Technical Paper 951696, 1995, https://doi.org/10.4271/951696.
Pages:
7
Abstract:
A key element of spacecraft thermal balance testing is the reliable determination of the final temperature values of the temperature equilibrium. At the end of a thermal balance test phase, temperature equilibrium is generally considered to be reached when nearly all thermocouples have fulfilled pre-defined temperature equilibrium criteria, e.g. in the form of a maximal allowed rate of temperature change.Test time can be reduced in the same manner as the equilibrium temperatures can be reliably extrapolated from the measured thermocouples temperatures, thus requiring only a less stringent equilibrium criterion to be fulfilled by the sensed temperatures.This paper concentrates on a mathematical theory for practical use in the extrapolation of equilibrium temperatures for spacecraft and units with essentially radiative couplings to their thermal environment.
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