A Pretest Planning Method for Model Calibration for Nonlinear Systems

Chen, Yousheng, 1985- (author): Linnéuniversitetet,Institutionen för maskinteknik (MT)

Linderholt, Andreas, 1968- (author): Linnéuniversitetet,Institutionen för maskinteknik (MT),Maskinteknik

Abrahamsson, Thomas, 1956 (author): Chalmers University of Technology,Chalmers tekniska högskola

(creator_code:org_t)

ISBN 9783319297545
2016-06-28
2016
English.
In: Model Validation and Uncertainty Quantification, Volume 3. - Cham : Springer. - 2191-5644 .- 2191-5652. - 9783319297538 - 9783319297545 ; , s. 371-379

Related links:: http://dx.doi.org/10...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; https://research.cha...; show less...

Abstract Subject headings

With increasing demands on more flexible and lighter engineering structures, it has been more common to take nonlinearity into account. Model calibration is an important procedure for nonlinear analysis in structural dynamics with many industrial applications. Pretest planning plays a key role in the previously proposed calibration method for nonlinear systems, which is based on multi-harmonic excitation and an effective optimization routine. This paper aims to improve the pretest planning strategy for the proposed calibration method. In this study, the Fisher information matrix (FIM), which is calculated from the gradients with respect to the chosen parameters with unknown values, is used for determining the locations, frequency range, and the amplitudes of the excitations as well as the sensor placements. This pretest planning based model calibration method is validated by a structure with clearance nonlinearity. Synthetic test data is used to simulate the test procedure. Model calibration and K-fold cross validation are conducted for the optimum configurations selected from the pretest planning as well as three other configurations. The calibration and cross validation results show that a more accurate estimation of parameters can be obtained by using test data from the optimum configuration.

TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Annan maskinteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Other Mechanical Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)

By the author/editor: Chen, Yousheng, ...; Linderholt, Andr ...; Abrahamsson, Tho ...; Xia, Yuying; Friswell, Michae ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Other Mechanical ...

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