Memorias de investigación
Artículos en revistas:
Linear Approach to the Orbiting Spacecraft Thermal Problem
Año:2012
Áreas de investigación
  • Ingeniería mecánica, aeronaútica y naval
Datos
Descripción
A linear method is developed for solving the nonlinear differential equations of a lumped-parameter thermal model of a spacecraft moving in a closed orbit. This method, based on perturbation theory, is compared with heuristic linearizations of the same equations. The essential feature of the linear approach is that it provides a decomposition in thermal modes, like the decomposition of mechanical vibrations in normal modes. The stationary periodic solution of the linear equations can be alternately expressed as an explicit integral or as a Fourier series. This method is applied to a minimal thermal model of a satellite with ten isothermal parts (nodes), and the method is compared with direct numerical integration of the nonlinear equations. The computational complexity of this method is briefly studied for general thermal models of orbiting spacecraft, and it is concluded that it is certainly useful for reduced models and conceptual design but it can also be more efficient than the direct integration of the equations for large models. The results of the Fourier series computations for the ten-node satellite model show that the periodic solution at the second perturbative order is sufficiently accurate.
Internacional
Si
JCR del ISI
Si
Título de la revista
Journal of Thermophysics And Heat Transfer
ISSN
0887-8722
Factor de impacto JCR
0,739
Información de impacto
Volumen
26
DOI
10.2514/1.T3748
Número de revista
3
Desde la página
511
Hasta la página
522
Mes
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  • Creador: Centro o Instituto I+D+i: Instituto Universitario de Microgravedad "Ignacio da Riva"