Modelling and simulation of landing dynamics for a space vehicle
Tutor / director / evaluatorGuglieri, Giorgio
Document typeMaster thesis (pre-Bologna period)
Rights accessRestricted access - confidentiality agreement
The purpose of this study is to examine the feasibility of using Monte Carlo simulation applied in the procedure to facilitate the simulation of landing dynamics at the touchdown moment. Historically, the designers and mission planners were more interested in getting to Mars with a functioning vehicle than in reaching a particular geographic location. Nowadays, when the landing conditions are “met” becomes more important the study of the touchdown moment. This report is divided in three parts: the study of Mars, the description of the Monte Carlo methods and the application of the Monte Carlo methods into a Mars lander in order to analyze the touchdown moment. The study of Mars is focused in passed space missions (especially to the Moon and Mars) trying to understand their misses and their highlights. Besides, I have worked with all type of Mars data (atmosphere, hazards, ground configuration, landing site selection…) to get a more accurate approximation. In the second part, is explained the Monte Carlo method and why this method is the best option for this type of simulation. Monte Carlo method is used to obtain statistical analysis of events using nominal values for single case events. Then, these values are dispersed to simulate off-nominal cases. Dispersed inputs are generated by a random number seed, maintaining the values of individual parameters between given +/- 3σ values. Once the basis are known, the modeling of the Mars lander contain the practical part of this thesis. The construction of a the final model is explained with details to better understand the common error when this procedure is used. Is important underline that the scope of this thesis is not design and improve the lander capabilities, the real scope is check if is possible create a procedure to do this job.
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