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Methodology and vibrational analysis for measurements on a VTOL RAPS
Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis a methodology for measuring vibrations has been produced andinvestigated for APID 60, a rotorcraft in a Vertical Take-off and landing remotelypiloted aircraft system (VTOL RPAS). A comparative study was carried out forthe purpose of identifying the methodology with respect to design modificationscommon to the APID 60. The pilot-study identified experimental modal analysis(EMA) as a feasible part of the methodology for experimentally extracting themodal parameters of a structure. The EMA was performed on the main frameof the APID 60 where an impact hammer test was chosen as the technique forextracting the response data. As a comparison a point mass was added to thestructure to alter the dynamic properties and the test was repeated.The results from the EMA was compared with a modal analysis performednumerically with a calculation software. Comparison of the results from EMAwith the modal analysis performed numerically indicates consistency. This confirmsa good reliability of the methodology produced. However, the structure onwhich the test were preformed is simple in terms of constant structural properties.Further work should therefore investigate whether this methodology of measuringvibrations could be successfully applied to a structure with higher complexity.

Place, publisher, year, edition, pages
2017. , 80 p.
Keyword [en]
Experimental modal analysis, impact hammer test, methodology, structural vibration, RPAS, VTOL, Certification
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:liu:diva-142928ISRN: LIU-IEI-TEK-A--15/02304--SEOAI: oai:DiVA.org:liu-142928DiVA: diva2:1156299
External cooperation
Cybaero AB
Supervisors
Examiners
Available from: 2017-11-13 Created: 2017-11-11 Last updated: 2017-11-13Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
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Output format
  • html
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