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The technique used in the modal strain test and the method used for parameter identification are described.
A total of 74 data points, from experimental runs in a fixed-bed pilot plant, have been used for parameter identification (52 points) and model validation (22 points).
We concentrate on two algorithms, namely EGO (for Efficient Global Optimization) and IAGO (for Informational Approach to Global Optimization), and describe how they can be used for parameter identification when the budget for evaluating the cost function is severely limited.
An extensive experimental database for a low-alloy steel is used for parameter identification, thus taking into account the effects of uniaxial compressive and tensile stress on the kinetics of phase transformation at different temperatures.
In the experiments a laser tracker system is used for parameter identification but the approach is also applicable to other measurement systems.
Here, data from the first visit was used for parameter identification, and data from the second visit was used for model evaluation.
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Lack of identification occurs when an objective function used for parameter estimation is not optimized at a single parameter value, but rather multiple values of the parameter satisfy the optimization criteria (2).
Poor identification was observed in the semiparametric GMM and SMM frameworks, in which estimating equations are used for parameter estimation.
Calibration for all parameters of both model versions was done using a step by step procedure thereby using different methods for parameter identification.
The recorded flight data were then used for a parameter identification study.
Current software packages used for modal parameter identification are based on measured frequency response of either a fixed structure having no rigid body modes or a free structure with flexible supports.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com