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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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