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A signal model adapted ESPRIT algorithm for joint estimation of spatial and temporal parameters in vibrational analysis of cylinders

Författare:
Publiceringsår: 2002
Språk: Engelska
Sidor: 360-364
Publikation/Tidskrift/Serie: 2002 IEEE Sensor Array and Multichannel Signal Processing Workshop Proceedings (Cat. No.02EX593)
Dokumenttyp: Konferensbidrag
Förlag: IEEE

Sammanfattning

This paper deals with the joint estimation of spatial mode shapes and temporal frequencies from transient vibrations measured by a uniform circular array of sensors encircling a cross-section of a cylinder. The geometry allows each 2D mode to be interpreted as two real planar waves impinging from mirrored directions with respect to the broadside of a uniform linear array. Algorithms for joint estimation tend, in the presence of noise, to produce signal roots that express planar waves impinging from only approximately mirrored directions. A recently published 2-D ESPRIT algorithm is modified to take advantage of the geometry, and to force the estimated planar waves to impinge from exactly mirrored directions. This reduces the estimation errors; the main advantage is more easily interpreted results. Memory requirements and complexity are significantly lower for the modified algorithm, since the decomposition of a large data matrix may be broken down into several small ones

Disputation

Nyckelord

  • Technology and Engineering
  • spatial mode shapes
  • cylinders
  • vibrational analysis
  • temporal parameters
  • spatial parameters
  • data matrix decomposition
  • modified algorithm
  • complexity reduction
  • memory requirements
  • estimation errors
  • mirrored directions
  • 2D ESPRIT algorithm
  • noise
  • signal roots
  • signal model adapted ESPRIT algorithm
  • joint estimation algorithms
  • temporal frequencies
  • transient vibrations
  • uniform circular sensors array
  • planar waves
  • uniform linear array

Övriga

2002 IEEE Sensor Array and Multichannel Signal Processing Workshop Proceedings
4-6 Aug. 2002
Rosslyn, VA, USA
Published
Yes
  • ISBN: 0-7803-7551-3

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