Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Frequency Prediction of a Von Karman Vortex Street Based on a Spectral Analysis Estimation
Year:2018
Research Areas
  • Aeronautical engineering
Information
Abstract
Spectral analysis studies the power distribution over frequency of a signal. This allows the characterization of time signals by its harmonics. This article will establish a relationship between the autocorrelation function and the spectrum. The direct implementation of the theory when analyzing a finite time signal results in a raw periodogram or first estimation of the spectrum. However, owing to the biased nature of the autocorrelation function, the periodogram obtained will not be a good estimation. Thus, several estimation techniques are needed in order to acquire a reliable spectrum. Amongst the techniques handled are the averaging Welch method, the use of window functions or tapering and the implementation of Fast Fourier Transform algorithms. To validate the accuracy and improvements made with these techniques, an algorithm is implemented in Matlab. Several synthetic signals are assessed and the classical Kármán Vortex Street is performed in a wind tunnel experiment. The results obtained are proof of the need for a careful study of the different estimation techniques when analyzing a signal
International
Si
JCR
No
Title
American Journal of Science and Technology
ISBN
2375-3846
Impact factor JCR
Impact info
Volume
5
Journal number
2
From page
26
To page
34
Month
MARZO
Ranking
Participants
  • Autor: Rafael Bardera Mora (INTA)
  • Autor: Miguel Angel Barcala Montejano (UPM)
  • Autor: Angel Antonio Rodriguez Sevillano (UPM)
  • Autor: Miguel Ruiz de Sotto (INTA)
  • Autor: Gonzalo González de Diego (INTA)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Aeronaves y Vehículos Espaciales
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)