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Title: Shape descriptors for mode-shape recognition and model updating
Authors: Wang, W
Mottershead, JE
Mares, C
Keywords: Modal Assurance Criterion;Zernike moment descriptor;Fourier descriptor;Wavelet descriptor
Issue Date: 2009
Citation: Journal of Physics: Conference Series, 2009, 181 (1)
Abstract: The most widely used method for comparing mode shapes from finite elements and experimental measurements is the Modal Assurance Criterion (MAC), which returns a single numerical value and carries no explicit information on shape features. New techniques, based on image processing (IP) and pattern recognition (PR) are described in this paper. The Zernike moment descriptor (ZMD), Fourier descriptor (FD), and wavelet descriptor (WD), presented in this article, are the most popular shape descriptors having properties that include efficiency of expression, robustness to noise, invariance to geometric transformation and rotation, separation of local and global shape features and computational efficiency. The comparison of mode shapes is readily achieved by assembling the shape features of each mode shape into multi-dimensional shape feature vectors (SFVs) and determining the distances separating them. © 2009 IOP Publishing Ltd.
ISSN: 1742-6588
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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