Improving lunar return entry range capability using enhanced skip trajectory guidance

Z. R. Putnam, S. H. Bairstow, R. D. Braun, G. H. Barton

Research output: Contribution to journalArticle

Abstract

The impending development of NASA's Orion crew exploration vehicle will require a new entry guidance algorithm that provides sufficient performance to meet all requirements. This study examined the effects on entry footprints of enhancing the skip trajectory entry guidance used in the Apollo program. The skip trajectory entry guidance was modified to include a numerical predictor-corrector phase during the atmospheric skip portion of the entry trajectory. A 4-degree-of-freedom simulation was used to determine the range capability of the entry vehicle for the baseline Apollo entry guidance and the predictor-corrector enhanced guidance with both high and low lofting at several lunar return entry conditions. The results show that the predictor-corrector guidance modification significantly improves the entry range capability of the crew exploration vehicle for the lunar return mission. The performance provided by the enhanced algorithm is likely to meet the entry range requirements for the crew exploration vehicle.

Original languageEnglish (US)
Pages (from-to)309-315
Number of pages7
JournalJournal of Spacecraft and Rockets
Volume45
Issue number2
DOIs
StatePublished - Mar 1 2008
Externally publishedYes

Fingerprint

entry
Crew Exploration Vehicle
trajectory
Trajectories
trajectories
lofting
predictions
footprint
NASA
requirements
footprints
vehicle
vehicles
degrees of freedom
simulation

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

Improving lunar return entry range capability using enhanced skip trajectory guidance. / Putnam, Z. R.; Bairstow, S. H.; Braun, R. D.; Barton, G. H.

In: Journal of Spacecraft and Rockets, Vol. 45, No. 2, 01.03.2008, p. 309-315.

Research output: Contribution to journalArticle

Putnam, Z. R. ; Bairstow, S. H. ; Braun, R. D. ; Barton, G. H. / Improving lunar return entry range capability using enhanced skip trajectory guidance. In: Journal of Spacecraft and Rockets. 2008 ; Vol. 45, No. 2. pp. 309-315.
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