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A multivariate interval approach for inverse uncertainty quantification with limited experimental data

Tijdschriftbijdrage - Tijdschriftartikel

This paper introduces an improved version of a novel inverse approach for the quantification of multivariate interval uncertainty for high dimensional models under scarce data availability.Furthermore, a conceptual and practical comparison of the method with the well-established probabilistic framework of Bayesian model updating via Transitional Markov Chain Monte Carlo is presented in the context of the DLR-AIRMOD test structure. First, it is shown that the proposed improvements of the inverse method alleviate the curse of dimensionality of the method with a factor up to $10^5$.Furthermore, the comparison with the Bayesian results revealed that the selection of the most appropriate method depends largely on the desired information and availability of data.In case large amounts of data are available, and/or the analyst desires full (joint)-probabilistic descriptors of the model parameter uncertainty, the Bayesian method is shown to be the most performing.On the other hand however, when such descriptors are not needed (e.g., for worst-case analysis), and only scarce data are available, the interval method is shown to deliver more objective and robust bounds on the uncertain parameters.Finally, also suggestions to aid the analyst in selecting the most appropriate method for inverse uncertainty quantification are given.
Tijdschrift: Mechanical Systems and Signal Processing
ISSN: 0888-3270
Volume: 118
Pagina's: 534 - 548
Jaar van publicatie:2019