Automated real-time targeting and guidance (ARTGUID) for lunar descent and precision landing

Brent W. Barbee, David E. Gaylor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

The guidance algorithms and software utilized during the Apollo missions for lunar descent and landing had fundamental limitations that precluded real-time guidance and autonomous Hazard Detection and Avoidance (HDA). This was partially due to the lack of closed form guidance solutions for the major portion of the descent braking phase. Emergent Space Technologies, Inc. has designed and developed prototype automated real-time targeting and guidance (ARTGUID) software for precision lunar landing and descent. Optimal control theory was successfully applied to produce closed form guidance solutions for the major portion of the descent braking phase. Improvements were also made to the quartic closed form solutions used (from Apollo) for the remainder of descent. Formulations for vehicle attitude were also developed and implemented, allowing the evolution of the vehicle attitude to be modeled and understood. The closed form constant thrust solutions and the improved quartics enabled real-time landing site re-targeting, which was demonstrated in simulation. This real-time re-targeting capability will be a key technology for autonomous Hazard Detection and Avoidance (HDA) during any future lunar landing mission.

Original languageEnglish (US)
Title of host publicationGuidance and Control 2010 - Advances in the Astronautical Sciences
Subtitle of host publicationProceedings of the 33rd Annual AAS Rocky Mountain Guidance and Control Conference
Pages149-164
Number of pages16
StatePublished - Dec 1 2010
Event33rd Annual AAS Rocky Mountain Guidance and Control Conference - Breckenridge, CO, United States
Duration: Feb 5 2010Feb 10 2010

Publication series

NameAdvances in the Astronautical Sciences
Volume137
ISSN (Print)0065-3438

Other

Other33rd Annual AAS Rocky Mountain Guidance and Control Conference
CountryUnited States
CityBreckenridge, CO
Period2/5/102/10/10

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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    Barbee, B. W., & Gaylor, D. E. (2010). Automated real-time targeting and guidance (ARTGUID) for lunar descent and precision landing. In Guidance and Control 2010 - Advances in the Astronautical Sciences: Proceedings of the 33rd Annual AAS Rocky Mountain Guidance and Control Conference (pp. 149-164). (Advances in the Astronautical Sciences; Vol. 137).