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- W2948608423 abstract "Abstract Operational modal analysis (OMA) has received tremendous interest from engineering fields in recent years. This paper develops a compact-bandwidth regularization approach for OMA within the signal processing framework. The key ingredient lies in the fact that a structural mode is always compact in the frequency domain and this results in the compact-bandwidth constraint for structural modes. To implicitly enforce the compact-bandwidth constraint, the compact-bandwidth regularization is introduced to conventional blind modal separation. Then, the alternating minimization algorithm is used to iteratively get the solution in the immediately-at-once or one-by-one manner. In proceeding so, the spectrum-peak-based rule is adopted for choice of initial modal parameters and the L-curve method in conjunction with a theoretically derived bound is applied to estimate a proper regularization parameter. Numerical examples and an experimental test case are studied along with comparison to some usual OMA approaches to see the performance and advantages of the proposed approach in modal identification." @default.
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- W2948608423 date "2019-09-01" @default.
- W2948608423 modified "2023-10-13" @default.
- W2948608423 title "Blind separation of structural modes by compact-bandwidth regularization" @default.
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- W2948608423 doi "https://doi.org/10.1016/j.ymssp.2019.05.051" @default.
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