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Combined EDL-mobility planning for planetary missions

Show simple item record Kuwata, Yoshiaki Balaram, Bob 2012-04-17T16:15:57Z 2012-04-17T16:15:57Z 2011-03-29
dc.identifier.citation Infotech@Aerospace 2011 Conference. Unleashing Unmanned Systems. St. Louis, Missouri, March 29–31, 2011 en_US
dc.identifier.clearanceno 11-1071
dc.description.abstract This paper presents an analysis framework for planetary missions that have coupled mobility and EDL (Entry-Descent-Landing) systems. Traditional systems engineering approaches to mobility missions such as MERs (Mars Exploration Rovers) and MSL (Mars Science Laboratory) independently study the EDL system and the mobility system, and does not perform explicit trade-off between them or risk minimization of the overall system. A major challenge is that EDL operation is inherently uncertain and its analysis results such as landing footprint are described using PDF (Probability Density Function). The proposed approach first builds a mobility cost-to-go map that encodes the driving cost of any point on the map to a science target location. The cost could include variety of metrics such as traverse distance, time, wheel rotation on soft soil, and closeness to hazards. It then convolves the mobility cost-to-go map with the landing PDF given by the EDL system, which provides a histogram of driving cost, which can be used to evaluate the overall risk of the mission. By capturing the coupling between EDL and mobility explicitly, this analysis framework enables quantitative tradeo between EDL and mobility system performance, as well as the characterization of risks in a statistical way. The simulation results are presented with a realistic Mars terrain data en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011. en_US
dc.subject EDL (Entry-Descent-Landing) en_US
dc.subject vehicle dynamics, en_US
dc.subject mission analysis en_US
dc.title Combined EDL-mobility planning for planetary missions en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Astrodynamics en_US

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