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Title
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Detection and quantification of the influence of time variation in frequency response function measurements using arbitrary excitations
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Author
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Abstract
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| This paper presents a nonparametric method for detecting and quantifying the influence of time variation in frequency response function measurements. The method is based on the estimation of the best linear time-invariant (BLTI) approximation of a linear time-variant (LTV) system from known input, noisy output data. The key idea consists in reformulating the single-input, single-output time-variant problem as a multiple-input, single-output time-invariant problem. In addition to the BLTI approximation of the LTV system, the contribution of the disturbing noise, the leakage error, and the time-varying effects at the output is also quantified. As such, the approximation error of the time-invariant framework is known. |
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Language
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English
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Source (journal)
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IEEE transactions on instrumentation and measurement. - New York, N.Y.
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Publication
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New York, N.Y.
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2012
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ISSN
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0018-9456
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DOI
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10.1109/TIM.2012.2210327
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Volume/pages
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61
:12
(2012)
, p. 3387-3395
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ISI
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000311352900030
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Full text (Publisher's DOI)
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