Adaptive gravitational force representation for fast trajectory propagation near small bodies

Andrew Colombi, Anil N. Hirani, Benjamin F. Villac

Research output: Contribution to journalArticlepeer-review

Abstract

We present an approximation scheme for gravitational forces near arbitrarily shaped small bodies. The approximation uses polynomial interpolation with an adaptive spatial data structure near the asteroid and spherical harmonics far from it. These data structures allow us to drive the approximation errors of the model to within user-defined thresholds, while significantly reducing the run time of trajectory integrations about small bodies. This alleviates the computational burden of Monte Carlo simulation for small-body proximity operation and mission design. We conclude with performance tests and models for the asteroid 1998 ML 14.

Original languageEnglish (US)
Pages (from-to)1041-1051
Number of pages11
JournalJournal of Guidance, Control, and Dynamics
Volume31
Issue number4
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Aerospace Engineering
  • Space and Planetary Science
  • Electrical and Electronic Engineering
  • Applied Mathematics

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