Výsledky vyhledávání - "Ulriksen, Martin Dalgaard"

Exploiting Sparseness in Damage Characterization: A Close Look at the Regularization Techniques

Autor: Memarzadeh, Esmaeil, Bernal, Dionisio, Ulriksen, Martin Dalgaard

Publikováno v: Memarzadeh, E, Bernal, D & Ulriksen, M D 2023, Exploiting Sparseness in Damage Characterization: A Close Look at the Regularization Techniques . in P Rizzo & A Milazzo (eds), European Workshop on Structural Health Monitoring-EWSHM 2022-Volume 2 . vol. 2, Lecture Notes in Civil Engineering, vol. 254, pp. 1058–1065 . https://doi.org/10.1007/978-3-031-07258-1_106

The idea of exploiting sparseness in under-determined damage characterization problems is not new, and regularizations techniques that tend to promote sparseness, such as L1-norm minimization, have been investigated in the last ten years or so. Altho

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Damage Localization Through Assignment of Invariant Eigenpairs

Autor: Ulriksen, Martin Dalgaard, Memarzadeh, Esmaeil, Bernal, Dionisio, Lopez, Jose A.

Publikováno v: Ulriksen, M D, Memarzadeh, E, Bernal, D & Lopez, J A 2023, Damage Localization Through Assignment of Invariant Eigenpairs . in P Rizzo & A Milazzo (eds), European Workshop on Structural Health Monitoring . vol. 2, Lecture Notes in Civil Engineering, vol. 254, pp. 737–744 . https://doi.org/10.1007/978-3-031-07258-1_74

The present paper reviews a method based on output feedback eigenstructure assignment for locating damage in minimum-phase structural systems with measurable input and output. The methodological concept is to assign a subset of eigenpairs invariant t

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Perturbation-invariant eigenvalue assignment for statistical damage localization

Autor: Ulriksen, Martin Dalgaard, Gres, Szymon, Bernal, D.

Publikováno v: Ulriksen, M D, Gres, S & Bernal, D 2023, Perturbation-invariant eigenvalue assignment for statistical damage localization . in EURODYN 2023 . 12th International Conference on Structural Dynamics., Delft, Netherlands, 02/07/2023 .

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https://pure.au.dk/portal/da/publications/perturbationinvariant-eigenvalue-assignment-for-statistical-damage-localization(4891aba7-9b3e-4c2b-b10d-de0b20c7c55c).html

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Closed-Loop Damage-Locating Vectors

Autor: Jepsen, Martin, Ulriksen, Martin Dalgaard, Bernal, Dionisio

Publikováno v: Jepsen, M, Ulriksen, M D & Bernal, D 2023, Closed-Loop Damage-Locating Vectors . in P Rizzo & A Milazzo (eds), European Workshop on Structural Health Monitoring . vol. 2, Lecture Notes in Civil Engineering, vol. 254, pp. 697–707 . https://doi.org/10.1007/978-3-031-07258-1_70

The present paper considers localization of stiffness-related damage in minimum-phase structural systems for which input and output data is collected both prior and posterior to damage formation. In an idealized setting, such damage induces a rank-de

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Eigenvector assignment for damage localization with invariant eigenvalues

Autor: Ulriksen, Martin Dalgaard, Dahl, M. B., Nielsen, M. E.

Publikováno v: Ulriksen, M D, Dahl, M B & Nielsen, M E 2023, Eigenvector assignment for damage localization with invariant eigenvalues. in 10th ECCOMAS Thematic Conference on Smart Structures and Materials. . 10th ECCOMAS Thematic Conference on Smart Structures and Materials., Patras, Greece, 03/07/2023 .

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Offline eigenvector assignment for mass perturbation localization

Autor: Ulriksen, Martin Dalgaard, Nielsen, Morten Eggert

Publikováno v: Ulriksen, M D & Nielsen, M E 2022, Offline eigenvector assignment for mass perturbation localization . in 33rd Nordic Seminar on Computational Mechanics (NSCM) .

The task of locating mass perturbations in structural systems has been explored extensively. Numerous methods address the task in a setting where perturbation-induced changes in some set of vibration features are mapped to the structural domain by ai

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Physical and Virtual Implementation of Closed-loop Designs for Model Updating

Autor: Jensen, Martin Skovmand, Hansen, Tommi Navntoft, Ulriksen, Martin Dalgaard, Bernal, Dionisio

Publikováno v: Jensen, M S, Hansen, T N, Ulriksen, M D & Bernal, D 2020, Physical and Virtual Implementation of Closed-loop Designs for Model Updating . in Z Jamaludin, M N Ali Mokhtar & M A Wahab (eds), Proceedings of the 13th International Conference on Damage Assessment of Structures : DAMAS 2019, 9-10 July 2019, Porto, Portugal . Springer, Lecture Notes in Mechanical Engineering, pp. 363-371, 13th International Conference on Damage Assessment of Structures (DAMAS 2019), Porto, Portugal, 09/07/2019 . https://doi.org/10.1007/978-981-13-8331-1_25

A recently proposed virtual implementation of output feedback based on signal processing eliminates the practical overhead associated with physical operation in closed loop. Additionally, the virtual implementation facilitates realization of multiple

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On the Model Order in Parameter Estimation using Virtual Compensators

Autor: Hansen, Tommi Navntoft, Jensen, Martin Skovmand, Ulriksen, Martin Dalgaard, Bernal, Dionisio

Publikováno v: Hansen, T N, Jensen, M S, Ulriksen, M D & Bernal, D 2020, On the Model Order in Parameter Estimation using Virtual Compensators . in Z Jamaludin, M N Ali Mokhtar & M A Wahab (eds), Proceedings of the 13th International Conference on Damage Assessment of Structures : DAMAS 2019, 9-10 July 2019, Porto, Portugal . Springer, Lecture Notes in Mechanical Engineering, pp. 498-506, 13th International Conference on Damage Assessment of Structures (DAMAS 2019), Porto, Portugal, 09/07/2019 . https://doi.org/10.1007/978-981-13-8331-1_36

Processing signals from open-loop system realizations can replace real-time operation using actuators in the design of closed-loop eigenstructures. One merit of the signal processing-based implementation is that it, in principle, allows virtual compe

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