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A Method for Efficient Flutter Analysis of Systems with Uncertain Modeling Parameters
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Optimization and Systems Theory.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
En metod för effektiv uppskattning av fladderhastigheten försystem med osäkra Parametrar (Swedish)
Abstract [en]

A method for efficient analysis of variations in utter speed predictions caused by parameter variations in the mass, stiffness and aerodynamic models of a wing structure is presented. The analysis method considers a linear uncertainty formulation and performs a perturbation analysis based on computation of eigenvalue differentials of a nominal system matrix. The method is applied in a test case study in which utter speed variations caused by variations in mass and aerodynamic properties of a delta wing model is analyzed. The report is concluded with a discussion of the validity of the results and of how the applicability of the method is affected by the assumptions on which it builds.

Abstract [sv]

Enmetod för effektiv uppskattning av fladderhastigheten för system med osäkraparametrar i modellerna för massa, styvhet och aerodynamik presenteras. Metodenförutsätter en linjär osäkerhetsmodell och uppskattar den lägsta fladderhastighetsom kan orsakas av parametervariationerna genom en analys som bygger på differentieringav egenvärden. Metoden appliceras i en studie av en delta vinge där skillnaderi fladderhastighet orsakade av massvariationer och aerodynamiska osäkerheteranalyseras. Rapporten avslutas med en diskussion om resultaten från teststudienoch om hur applicerbarheten av metoden påverkas av de antaganden på vilka denbygger

Place, publisher, year, edition, pages
2014.
Series
TRITA-MAT-E, 2014:19
National Category
Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-143346OAI: oai:DiVA.org:kth-143346DiVA: diva2:706524
Subject / course
Systems Engineering
Educational program
Master of Science - Aerospace Engineering
Supervisors
Examiners
Available from: 2014-03-20 Created: 2014-03-19 Last updated: 2014-03-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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Language
  • de-DE
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  • Other locale
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Output format
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