A study of variability and applicability of various signal processing techniques in structural system identification
The structural responses and vibration properties such as frequencies and mode shapes are directly related to the structural mass and stiffness. Changing structural conditions will affect the structural responses and vibration properties. Structural conditions can thus be identified through measurem...
| Main Authors: | , , |
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| Format: | Journal Article |
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Institution of Engineers, Australia
2013
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| Online Access: | http://search.informit.com.au/documentSummary;res=IELENG;dn=221343621591034 http://hdl.handle.net/20.500.11937/35380 |
| _version_ | 1848754481651515392 |
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| author | Bao, C. Hao, Hong Li, Z. |
| author_facet | Bao, C. Hao, Hong Li, Z. |
| author_sort | Bao, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The structural responses and vibration properties such as frequencies and mode shapes are directly related to the structural mass and stiffness. Changing structural conditions will affect the structural responses and vibration properties. Structural conditions can thus be identified through measurements of structural vibration. However, certain uncertainties associated with structure models, changing ambient environmental conditions, changing loading conditions, equipment noises and various signal processing techniques used in extracting structural vibration properties, etc. is inevitable. The influences of these uncertainties on structural vibration properties might be more significant than that of the structural damage, therefore, cause false identification or result in the true structural damage not identifiable. This paper studies the applicability and reliability of a few popularly used modal identification methods including time-domain, frequency-domain and time-frequency domain methods for civil structural system identification. The results indicate that on average a 2% to 3% error tends to be yielded by using different signal processing techniques for vibration frequencies identification when the signal is not heavily noise contaminated, which should be taken into account when estimating the damage detection results. The applicability of the time-frequency domain methods to the identification of time-varying system either with sudden change or continuous variance is also discussed. |
| first_indexed | 2025-11-14T08:41:06Z |
| format | Journal Article |
| id | curtin-20.500.11937-35380 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:41:06Z |
| publishDate | 2013 |
| publisher | Institution of Engineers, Australia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-353802017-01-30T13:49:22Z A study of variability and applicability of various signal processing techniques in structural system identification Bao, C. Hao, Hong Li, Z. Vibration-based system identification Variability and applicability study Time-frequency domain methods Frequency-domain methods Time-varying system Time-domain methods The structural responses and vibration properties such as frequencies and mode shapes are directly related to the structural mass and stiffness. Changing structural conditions will affect the structural responses and vibration properties. Structural conditions can thus be identified through measurements of structural vibration. However, certain uncertainties associated with structure models, changing ambient environmental conditions, changing loading conditions, equipment noises and various signal processing techniques used in extracting structural vibration properties, etc. is inevitable. The influences of these uncertainties on structural vibration properties might be more significant than that of the structural damage, therefore, cause false identification or result in the true structural damage not identifiable. This paper studies the applicability and reliability of a few popularly used modal identification methods including time-domain, frequency-domain and time-frequency domain methods for civil structural system identification. The results indicate that on average a 2% to 3% error tends to be yielded by using different signal processing techniques for vibration frequencies identification when the signal is not heavily noise contaminated, which should be taken into account when estimating the damage detection results. The applicability of the time-frequency domain methods to the identification of time-varying system either with sudden change or continuous variance is also discussed. 2013 Journal Article http://hdl.handle.net/20.500.11937/35380 http://search.informit.com.au/documentSummary;res=IELENG;dn=221343621591034 Institution of Engineers, Australia restricted |
| spellingShingle | Vibration-based system identification Variability and applicability study Time-frequency domain methods Frequency-domain methods Time-varying system Time-domain methods Bao, C. Hao, Hong Li, Z. A study of variability and applicability of various signal processing techniques in structural system identification |
| title | A study of variability and applicability of various signal processing techniques in structural system identification |
| title_full | A study of variability and applicability of various signal processing techniques in structural system identification |
| title_fullStr | A study of variability and applicability of various signal processing techniques in structural system identification |
| title_full_unstemmed | A study of variability and applicability of various signal processing techniques in structural system identification |
| title_short | A study of variability and applicability of various signal processing techniques in structural system identification |
| title_sort | study of variability and applicability of various signal processing techniques in structural system identification |
| topic | Vibration-based system identification Variability and applicability study Time-frequency domain methods Frequency-domain methods Time-varying system Time-domain methods |
| url | http://search.informit.com.au/documentSummary;res=IELENG;dn=221343621591034 http://hdl.handle.net/20.500.11937/35380 |