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http://dx.doi.org/10.5050/KSNVN.2006.16.7.769

Modal Parameter Identification from Frequency Response Functions Using Legendre Polynomials  

Park, Nam-Gyu (한국원자력연료(주))
Jeon, Sang-Youn (한국원자력연료(주))
Suh, Jeong-Min (한국원자력연료(주))
Kim, Hyeong-Koo (한국원자력연료(주))
Jang, Young-Ki (한국원자력연료(주))
Kim, Kyu-Tae (한국원자력연료(주))
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.16, no.7, 2006 , pp. 769-776 More about this Journal
Abstract
A measured frequency response function can be represented as a ratio of two polynomials. A curve-fitting of frequency responses with Legendre polynomialis suggested in the paper. And the suggested curve-fitting algorithm is based on the least-square error method. Since the Legendre polynomials satisfy the orthogonality condition, the curve-fitting with the polynomials results to more reliable curve-fitting than ordinary polynomial method. Though the proposed curve-fitting with Legendre polynomials cannot cover all frequency range of interest, example shows that the suggested method is quite applicable in a limited frequency band.
Keywords
Modal Parameter Identification; Curve-fitting; Legendre Polynomial;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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