Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Analysis of predictive entry guidance for a Mars lander under high model uncertainties
Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
2011 (English)In: Acta Astronautica, Vol. 68Article in journal (Refereed) Published
Abstract [en]

The problem of precision landing on Mars is now considered to be an essential challenge in the planned Mars missions. The paper focused on the guided atmospheric entry as a predominant phase in achieving a desired target state, as compared with the following parachute and powered descent. The predictive algorithms for the longitudinal guidance of a low-lift entry vehicle are treated. The purpose is to investigate applicability of the predictive strategy under possible high discrepancies between the on-board dynamic model and real environment while in entry trajectory. The comparative performance analysis based on computer simulation has been made between the standard one-parametric “shooting” predictive algorithm and a more complex two-parametric algorithm providing lower final velocity and, thus, expanding the interval of admissible downrange. However, both algorithms display considerable degradation of downrange accuracy in the cases when the actual drag force is larger than the modelled one. An acceptable solution has been found by including to both predictive guidance schemes an identification algorithm that repeatedly adapts the on-board model to varied environment in real time scale.

Place, publisher, year, edition, pages
Elsevier Ltd. , 2011. Vol. 68
Keyword [en]
Mars lander; Entry phase; Predictive guidance; Precision landing; Atmospheric uncertainties; Adaptation
National Category
Information Systems
Research subject
Computer and Systems Sciences
Identifiers
URN: urn:nbn:se:su:diva-70559DOI: 10.1016/j.actaastro.2010.08.005OAI: oai:DiVA.org:su-70559DiVA: diva2:482006
Available from: 2012-01-23 Created: 2012-01-23

Open Access in DiVA

fulltext(631 kB)373 downloads
File information
File name FULLTEXT01.pdfFile size 631 kBChecksum SHA-512
742183f5b9e5e9352e0d54ae3b1750f80e5776e5cdfd4ed5b53ec162de797d6c5537425bf6fa9d0ed2acb219b00181a1fb4de67bfcd0507b3e93f0c3ee04bd20
Type fulltextMimetype application/pdf

Other links

Publisher's full text
By organisation
Department of Computer and Systems Sciences
Information Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 373 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 116 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf