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Citation link: http://nbn-resolving.de/urn:nbn:de:gbv:46-00104952-14
00104952-1.pdf
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Touchdown Dynamics and the Probability of Terrain Related Failure of Planetary Landing Systems : A Contribution to the Landing Safety Assessment Process


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Other Titles: Aufsetzdynamik und die Wahrscheinlichkeit geländebedingten Versagens planetarer Landesysteme : Ein Beitrag zur Landesicherheitsbewertung
Authors: Witte, Lars 
Supervisor: Dittus, Hansjörg
1. Expert: Dittus, Hansjörg
2. Expert: Oberst, Jürgen 
Abstract: 
Landing safety assessment is an integral element of the planning of a landing mission. This thesis contributes to such assessment with the modelling and deduction of the functional limits of a legged landing system and its terrain-related failure probabilities. A mathematical method has been developed to determine these terrain-related failure probabilities. The lander's touchdown dynamics is represented by a high-fidelity numerical multibody simulation which is validated by experimental data from a dedicated test campaign. The analysis of the terrain-related failure probabilities remains incomplete without knowledge about the geotechnical properties of the landing site. This information is obtained from a landing site characterization. An analysis step extracts this information from high resolution digital terrain models under consideration of the specific baselength determined by the landing platform's footprint. A robotic lunar landing mission is used as application case study.
Keywords: Landing safety assessment, landing site characterization, planetary exploration, touchdown dynamics, terrain-related failure, multibody landing simulation
Issue Date: 20-Nov-2015
Type: Dissertation
URN: urn:nbn:de:gbv:46-00104952-14
Institution: Universität Bremen 
Faculty: FB4 Produktionstechnik 
Appears in Collections:Dissertationen

  

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