| KEYWORD |
A computationally efficient implementation of the Loewner Framework for modal analysis of aerospace and civil structures
Thesis abroad
keywords DAMAGE DETECTION, MODAL ANALYSIS, STRUCTURAL DYNAMICS, STRUCTURAL HEALTH MONITORING, VIBRATION DIAGNOSTICS
Reference persons MARCO CIVERA
External reference persons Prof Gabriele Dessena, Universidad Carlos III de Madrid, Spain
Thesis type EXPERIMENTAL, NUMERICAL
Description This thesis is primarily intended for aerospace, civil, or mechanical engineering students with an interest in structural dynamics.
Ground Vibration Testing (GVT) is of paramount importance in the design and certification process of air and space vehicles. Current industry-standard techniques for evaluating modal parameters from frequency domain data have the major drawback of the potential ill-conditioning of the fitting process. The Loewner Framework [1] was recently proposed to overcome this. However, being an interpolation technique suffers from a degradation in computational performance for large datasets. This master thesis aims to identify, apply and validate a process, technique, or enhancement for the computation of the Loewner matrices [2] to relieve their computational performance for large datasets. This work would be carried out on numerical and experimental datasets (already available) of aeronautical, e.g. flexible wings, and civil, e.g. bridges, structures.
[1] G. Dessena, M. Civera, L. Zanotti Fragonara, D. I. Ignatyev, and J. F. Whidborne, ‘A Loewner-Based System Identification and Structural Health Monitoring Approach for Mechanical Systems’, Structural Control and Health Monitoring, vol. 2023. Hindawi Limited, pp. 1–22, Apr. 18, 2023. doi: 10.1155/2023/1891062.
[2] D. Palitta and S. Lefteriu, ‘An Efficient, Memory-Saving Approach for the Loewner Framework’, Journal of Scientific Computing, vol. 91, no. 2. Springer Science and Business Media LLC, Mar. 16, 2022. doi: 10.1007/s10915-022-01800-3.
Required skills Good basics of MATLAB and/or basics of Python (the student will be supported in further developing his/her coding skill during the project)
Notes Required grade average: >=27/30 (qualifying interview with the Spanish supervisor also required); knowledge of English at B2 level (minimum)
Deadline 28/03/2025
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