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Uncertainty Analysis of the Aerodynamic Coefficients
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Flight Dynamics.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis treats an error propagation analysis used to estimate the uncertainty of the aerodynamic coefficients. The propagation methods used in this analysis are a Taylor Series Method and a Monte Carlo Method. The Taylor Series Method uses the partial derivatives of each input variable whereas the Monte Carlo Method uses random and repeated samples from the probability density function of each variable. By comparing the results obtained by the different methods, the results can be validated. Coverage intervals with a coverage probability of 95% are calculated along with the percentage contribution each input variable has on the expanded uncertainty. The results showed that the uncertainty of the coefficients varied between 10% and 20% and negligible differences between the methods were observed. More accurate measurements of the dynamic pressure and the position of the center of gravity are needed in order to decrease the uncertainty.

Place, publisher, year, edition, pages
2017. , p. 11
Series
TRITA-AVE, ISSN 1651-7660 ; 2018:51
National Category
Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-223317OAI: oai:DiVA.org:kth-223317DiVA, id: diva2:1183281
External cooperation
SAAB
Examiners
Available from: 2018-02-16 Created: 2018-02-16 Last updated: 2018-02-16Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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Output format
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