A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems
In many engineering applications, unknown states, inputs, and parameters exist in the structures. However, most methods require one or two of these variables to be known in order to identify the other(s). Recently, the authors have proposed a method called EGDF for coupled state/input/parameter iden...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/7691721 |
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| _version_ | 1850238107182432256 |
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| author | Zhimin Wan Ting Wang Lin Li Zhichao Xu |
| author_facet | Zhimin Wan Ting Wang Lin Li Zhichao Xu |
| author_sort | Zhimin Wan |
| collection | DOAJ |
| description | In many engineering applications, unknown states, inputs, and parameters exist in the structures. However, most methods require one or two of these variables to be known in order to identify the other(s). Recently, the authors have proposed a method called EGDF for coupled state/input/parameter identification for nonlinear system in state space. However, the EGDF method based solely on acceleration measurements is found to be unstable, which can cause the drift of the identified inputs and displacements. Although some regularization methods can be adopted for solving the problem, they are not suitable for joint input-state identification in real time. In this paper, a strategy of data fusion of displacement and acceleration measurements is used to avoid the low-frequency drift in the identified inputs and structural displacements for linear structural systems. Two numerical examples about a plane truss and a single-stage isolation system are conducted to verify the effectiveness of the proposed modified EGDF algorithm. |
| format | Article |
| id | doaj-art-012f300f396343ffbee2c31a2254dd17 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-012f300f396343ffbee2c31a2254dd172025-08-20T02:01:34ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/76917217691721A Novel Coupled State/Input/Parameter Identification Method for Linear Structural SystemsZhimin Wan0Ting Wang1Lin Li2Zhichao Xu3School of Vehicle and Transportation Engineering, Nantong Vocational University, Qingnian Middle Road No. 89, Nantong, ChinaSchool of Mechanical Engineering, Nantong Vocational University, Qingnian Middle Road No. 89, Nantong, ChinaState Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaIn many engineering applications, unknown states, inputs, and parameters exist in the structures. However, most methods require one or two of these variables to be known in order to identify the other(s). Recently, the authors have proposed a method called EGDF for coupled state/input/parameter identification for nonlinear system in state space. However, the EGDF method based solely on acceleration measurements is found to be unstable, which can cause the drift of the identified inputs and displacements. Although some regularization methods can be adopted for solving the problem, they are not suitable for joint input-state identification in real time. In this paper, a strategy of data fusion of displacement and acceleration measurements is used to avoid the low-frequency drift in the identified inputs and structural displacements for linear structural systems. Two numerical examples about a plane truss and a single-stage isolation system are conducted to verify the effectiveness of the proposed modified EGDF algorithm.http://dx.doi.org/10.1155/2018/7691721 |
| spellingShingle | Zhimin Wan Ting Wang Lin Li Zhichao Xu A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems Shock and Vibration |
| title | A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems |
| title_full | A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems |
| title_fullStr | A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems |
| title_full_unstemmed | A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems |
| title_short | A Novel Coupled State/Input/Parameter Identification Method for Linear Structural Systems |
| title_sort | novel coupled state input parameter identification method for linear structural systems |
| url | http://dx.doi.org/10.1155/2018/7691721 |
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