Comparison of real-time guidance options for discrete-event drag modulation entry at mars

Destiny M. Fawley, Zachary R. Putnam

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


An analysis of two guidance algorithms, a numeric predictor corrector and a velocity trigger, for single-stage entry drag modulation is presented. The performance of both algorithms is analyzed with a three degree-of-freedom simulation and Monte Carlo techniques. Entry conditions and vehicle parameters are varied to identify trends in performance across different initial conditions, ballistic coefficient ratios, and target locations. Results indicate that both algorithms can provide landing accuracy of 10 km across a range of vehicle properties and entry conditions. The velocity trigger can perform nearly as well as the numerical predictor corrector for missions with low ballistic coefficient ratios and entry flight-path angles steeper than-18 deg. The numeric predictor corrector provides consistent flight performance across all entry parameters with accuracy better than approximately 5 km.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105951
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF


ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Aerospace Engineering


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