Michele Ughetto
Maximizing System Identification Optimal Sensor Placement and Value of Information in Modal Parameter Estimation.
Rel. Giulio Ventura, Marco Civera, Eleonora Maria Tronci. Politecnico di Torino, Master of science program in Civil Engineering, 2025
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Abstract
Characterizing the short- and long-term dynamic behavior of civil structures and infrastructures is critical to understanding their performance and reliability over time. It is common to describe their structural behavior in the modal space in terms of natural frequencies, damping ratios, and mode shapes. These parameters provide quantities of interest that can be interpreted from a physical-mechanical perspective and can be used for various purposes, such as model updating, damage detection, and performance assessment. However, several challenges exist in the extraction strategies for the modal parameters. First, modal identification techniques often require selecting user-defined parameters, which influence the system identification process and, consequently, the results.
Second, the selection of sensors, their position, and their number are crucial: an incorrect choice of sensor or position can result in missing essential information for identification
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