Cargando…

Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors

Load identification plays an important role in structural health monitoring, which aims at preventing structural failures. In order to identify load for linear systems and nonlinear systems, this paper presents methods to identify load for a cantilever beam based on dynamic strain measurement by Fib...

Descripción completa

Detalles Bibliográficos
Autores principales: Song, Xuegang, Zhang, Yuexin, Liang, Dakai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579550/
https://www.ncbi.nlm.nih.gov/pubmed/28788085
http://dx.doi.org/10.3390/s17081733
_version_ 1783260727022190592
author Song, Xuegang
Zhang, Yuexin
Liang, Dakai
author_facet Song, Xuegang
Zhang, Yuexin
Liang, Dakai
author_sort Song, Xuegang
collection PubMed
description Load identification plays an important role in structural health monitoring, which aims at preventing structural failures. In order to identify load for linear systems and nonlinear systems, this paper presents methods to identify load for a cantilever beam based on dynamic strain measurement by Fiber Bragg Grating (FBG) sensors. For linear systems, the proposed inverse method consists of Kalman filter with no load terms and a linear estimator. For nonlinear systems, the proposed inverse method consists of cubature Kalman filter (CKF) with no load terms and a nonlinear estimator. In the process of load identification, the state equations of the beam structures are constructed by using the finite element method (FEM). Kalman filter or CKF is used to suppress noise. The residual innovation sequences, gain matrix, and innovation covariance generated by Kalman filter or CKF are used to identify a load. To prove the effectiveness of the proposed method, numerical simulations and experiments of the beam structures are employed and the results show that the method has an excellent performance.
format Online
Article
Text
id pubmed-5579550
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-55795502017-09-06 Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors Song, Xuegang Zhang, Yuexin Liang, Dakai Sensors (Basel) Article Load identification plays an important role in structural health monitoring, which aims at preventing structural failures. In order to identify load for linear systems and nonlinear systems, this paper presents methods to identify load for a cantilever beam based on dynamic strain measurement by Fiber Bragg Grating (FBG) sensors. For linear systems, the proposed inverse method consists of Kalman filter with no load terms and a linear estimator. For nonlinear systems, the proposed inverse method consists of cubature Kalman filter (CKF) with no load terms and a nonlinear estimator. In the process of load identification, the state equations of the beam structures are constructed by using the finite element method (FEM). Kalman filter or CKF is used to suppress noise. The residual innovation sequences, gain matrix, and innovation covariance generated by Kalman filter or CKF are used to identify a load. To prove the effectiveness of the proposed method, numerical simulations and experiments of the beam structures are employed and the results show that the method has an excellent performance. MDPI 2017-07-28 /pmc/articles/PMC5579550/ /pubmed/28788085 http://dx.doi.org/10.3390/s17081733 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Song, Xuegang
Zhang, Yuexin
Liang, Dakai
Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors
title Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors
title_full Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors
title_fullStr Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors
title_full_unstemmed Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors
title_short Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors
title_sort load identification for a cantilever beam based on fiber bragg grating sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579550/
https://www.ncbi.nlm.nih.gov/pubmed/28788085
http://dx.doi.org/10.3390/s17081733
work_keys_str_mv AT songxuegang loadidentificationforacantileverbeambasedonfiberbragggratingsensors
AT zhangyuexin loadidentificationforacantileverbeambasedonfiberbragggratingsensors
AT liangdakai loadidentificationforacantileverbeambasedonfiberbragggratingsensors