A. James Clark School of Engineering

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Automatic Rendering of Astrodynamics Expressions for Efficient Evaluation
(American Astronautical Society, 1998) Healy, Liam M.; Travisano, Jeffrey J.
In this paper, we describe the automatic rendering of expressions computed using symbolic manipulation. Computations from astrodynamics frequently can be put in a fixed hierarchy of polynomials and Fourier series. Once in this form, FORTRAN subprograms can be generated automatically in a form that lends itself to numerical evaluation. The goal of the current work is to present an approach for using symbolic manipulation techniques to produce a Fortran representation of the normalized Hamiltonian and other supporting equations representing as many of the actual physical effects on satellites as possible.