Fully automated operational modal identification of regular and irregular buildings with ensemble learning

Mostafaei, H; Mostofinejad, D; Ghamami, M; Wu, C

Fully automated operational modal identification of regular and irregular buildings with ensemble learning

Mostafaei, H Mostofinejad, D Ghamami, M Wu, C

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Structures, 2023, 58, pp. 105439
Issue Date:: 2023-12-01

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Field	Value	Language
dc.contributor.author	Mostafaei, H
dc.contributor.author	Mostofinejad, D
dc.contributor.author	Ghamami, M
dc.contributor.author	Wu, C https://orcid.org/0000-0001-8907-8493
dc.date.accessioned	2024-04-08T08:41:40Z
dc.date.available	2024-04-08T08:41:40Z
dc.date.issued	2023-12-01
dc.identifier.citation	Structures, 2023, 58, pp. 105439
dc.identifier.issn	2352-0124
dc.identifier.issn	2352-0124
dc.identifier.uri	http://hdl.handle.net/10453/177579
dc.description.abstract	Modal identification, a type of system identification that employs modal analysis, can be automated to reduce user interference in extracting modal parameters. Modal analysis is a valuable tool for obtaining a structure's modal parameters, which define its dynamic characteristics. Operational modal identification is a specific type of modal analysis that uses only system outputs to extract modal parameters. The present study aims to introduce a fully automated modal identification algorithm to identify modal parameters for an unknown system based on its output information. The algorithm uses a stochastic subspace algorithm to extract modal parameters, requiring only the appropriate degree of the state-space model estimated using the Singular Value Criterion. Several features are used to create a feature space that separates physical and spurious modes. The Improved Distance Evaluation algorithm selects appropriate features, making the identification process more accurate and flexible. The identification algorithm employs clustering algorithms with different approaches and the Dempster-Shafer data fusion algorithm to integrate clustering algorithm results and avoid divergence among them. Due to limited data diversity for identification in cases where only one dataset is available, statistical resampling methods are used as an alternative. The proposed algorithm can identify modal parameters using only one dataset of the building structure. Signal processing, data collection, clustering, feature extraction, model reduction, and data fusion are all aspects of this algorithm. To assess its performance, four regular and irregular buildings are considered as case studies. The presented modal identification algorithm is highly accurate and robust with the repeatable result as compared to similar algorithms, with extracted modal parameters demonstrating high stability.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Structures
dc.relation.isbasedon	10.1016/j.istruc.2023.105439
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	4005 Civil engineering
dc.title	Fully automated operational modal identification of regular and irregular buildings with ensemble learning
dc.type	Journal Article
utslib.citation.volume	58
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-08T08:41:38Z
pubs.publication-status	Published
pubs.volume	58

Abstract:

Modal identification, a type of system identification that employs modal analysis, can be automated to reduce user interference in extracting modal parameters. Modal analysis is a valuable tool for obtaining a structure's modal parameters, which define its dynamic characteristics. Operational modal identification is a specific type of modal analysis that uses only system outputs to extract modal parameters. The present study aims to introduce a fully automated modal identification algorithm to identify modal parameters for an unknown system based on its output information. The algorithm uses a stochastic subspace algorithm to extract modal parameters, requiring only the appropriate degree of the state-space model estimated using the Singular Value Criterion. Several features are used to create a feature space that separates physical and spurious modes. The Improved Distance Evaluation algorithm selects appropriate features, making the identification process more accurate and flexible. The identification algorithm employs clustering algorithms with different approaches and the Dempster-Shafer data fusion algorithm to integrate clustering algorithm results and avoid divergence among them. Due to limited data diversity for identification in cases where only one dataset is available, statistical resampling methods are used as an alternative. The proposed algorithm can identify modal parameters using only one dataset of the building structure. Signal processing, data collection, clustering, feature extraction, model reduction, and data fusion are all aspects of this algorithm. To assess its performance, four regular and irregular buildings are considered as case studies. The presented modal identification algorithm is highly accurate and robust with the repeatable result as compared to similar algorithms, with extracted modal parameters demonstrating high stability.

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http://hdl.handle.net/10453/177579