Modal Appropriation for Use with In-Operation Modal Analysis
We propose in this paper a numerical modal appropriation method for use with in-operation modal analysis (INOPMA). The key idea is to realize that the correlation sequence of the system output is the sum of decaying sinusoids with a certain phase shift and therefore it may be considered as an impuls...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/537030 |
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| _version_ | 1832551111312015360 |
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| author | M. Abdelghani D. J. Inman |
| author_facet | M. Abdelghani D. J. Inman |
| author_sort | M. Abdelghani |
| collection | DOAJ |
| description | We propose in this paper a numerical modal appropriation method for use with in-operation modal analysis (INOPMA). The key idea is to realize that the correlation sequence of the system output is the sum of decaying sinusoids with a certain phase shift and therefore it may be considered as an impulse response. The method is based on performing a numerical convolution of a single sine wave force with the system output correlation sequence. The steps are then similar to the classical modal appropriation method, although the characteristic frequencies are different. This approach is validated and compared to a subspace method on simulated data as well as on experimental data and it is shown that INOPMA outperforms the subspace method. |
| format | Article |
| id | doaj-art-55df8e1c597147b3ba3860cdf0e1a1bb |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-55df8e1c597147b3ba3860cdf0e1a1bb2025-02-03T06:04:55ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/537030537030Modal Appropriation for Use with In-Operation Modal AnalysisM. Abdelghani0D. J. Inman1ISSAT Sousse, Avenue Ibn Khaldoun, Taffala, 4003 Sousse, TunisiaUniversity of Michigan, Ann Arbor, MI 48109, USAWe propose in this paper a numerical modal appropriation method for use with in-operation modal analysis (INOPMA). The key idea is to realize that the correlation sequence of the system output is the sum of decaying sinusoids with a certain phase shift and therefore it may be considered as an impulse response. The method is based on performing a numerical convolution of a single sine wave force with the system output correlation sequence. The steps are then similar to the classical modal appropriation method, although the characteristic frequencies are different. This approach is validated and compared to a subspace method on simulated data as well as on experimental data and it is shown that INOPMA outperforms the subspace method.http://dx.doi.org/10.1155/2015/537030 |
| spellingShingle | M. Abdelghani D. J. Inman Modal Appropriation for Use with In-Operation Modal Analysis Shock and Vibration |
| title | Modal Appropriation for Use with In-Operation Modal Analysis |
| title_full | Modal Appropriation for Use with In-Operation Modal Analysis |
| title_fullStr | Modal Appropriation for Use with In-Operation Modal Analysis |
| title_full_unstemmed | Modal Appropriation for Use with In-Operation Modal Analysis |
| title_short | Modal Appropriation for Use with In-Operation Modal Analysis |
| title_sort | modal appropriation for use with in operation modal analysis |
| url | http://dx.doi.org/10.1155/2015/537030 |
| work_keys_str_mv | AT mabdelghani modalappropriationforusewithinoperationmodalanalysis AT djinman modalappropriationforusewithinoperationmodalanalysis |