Dynamic Deformation Reconstruction of Variable Section WING with Fiber Bragg Grating Sensors

Zhen, Fu; Zhao, Yong; Bao, Hong; Zhao, Feifei

doi:10.3390/s19153350

Cited by 14 publications

(9 citation statements)

References 12 publications

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“…Fiber Bragg Grating sensors have been widely used in collecting strain information of large flexible structures because of their small size, anti-electromagnetic interference, and high measurement accuracy. 33 According to the coupled-mode theory, when broadband light is transmitted in the fiber grating, mode coupling is generated, the relationship between the Bragg reflection peak wavelength and the fiber grating period is as follows:…”

Section: Principle Of Fbg Strain Measurementmentioning

confidence: 99%

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Displacement field reconstruction technique for plate-like structures based on model superposition method

Yan

Cheng

Zhang

et al. 2022

Measurement and Control

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To achieve real-time sensing and deformation reconstruction of flexible plate structure, a 3D reconstruction technique based on a quasi-distributed fiber grating sensor network and order-optimized modal superposition method is proposed. Graphic visualization is introduced to the field of deformation monitoring, then the displacement field reconstruction of the typical structure of spacecraft is realized. Firstly, a finite element model of the four-sided fixed-supported plate structure is constructed, and the conversion matrix of surface strain and displacement are obtained based on modal analysis, and then the modal parameters are optimized through static simulation experiments; Secondly, the influence of the number and position of sensors on the reconstruction accuracy is studied, then a high-density distributed fiber grating sensor network is attached to the surface of the plate to construct an experimental FBG model of the spacecraft; Finally, concentrated loads are applied to the structure at different positions, and structure’s surface strain information is collected by FBG network, then the morphological reconstruction of the deformed structure is realized based on the improved model superposition method, which proves the feasibility of the algorithm. The results show that the reconstruction method’s average absolute error is less than 0.13 mm, so this method can be used to displace field reconstruction problems of flexible structures.

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Section: Principle Of Fbg Strain Measurementmentioning

confidence: 99%

Section: Principle Of Displacement Field Reconstructionmentioning

confidence: 99%

Displacement field reconstruction technique for plate-like structures based on model superposition method

Yan

Cheng

Zhang

et al. 2022

Measurement and Control

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“…In "Dynamic Deformation Reconstruction of Variable Section WING with Fiber Bragg Grating Sensors" [10], a dynamic reconstruction algorithm based on the inverse finite element method and fuzzy network was proposed to sense the deformation of the variable-section beam structure. Considering the installation error of the fiber Bragg grating (FBG) sensor and the dynamic un-modeled error caused by the difference between the static model and dynamic model, the real-time measured strain was corrected using a solidified fuzzy network.…”

Section: Summary Of Special Issue Papersmentioning

confidence: 99%

Special Issue “Fiber Optic Sensors and Applications”: An Overview

Wei

Tjin

2020

Sensors

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“…The inverse finite element method (IFEM) [22][23][24] is a method proposed by Tessler, Spangler et al that can reconstruct the global displacement field of a structural body based on the surface strain at some locations of the structure, which uses the difference between the measured strain and the finite element calculated strain as an error function and applies a variational method to obtain a minimized error function and thus reconstruct the displacement field. Fu et al [25] proposed a dynamic reconstruction algorithm based on IFEM method and fuzzy network to sense the deformation of variable section beam structure and established a deformation reconstruction model of variable section beam unit to monitor the deformation of variable section wing in real-time. Foss and Haugse et al [26] proposed the concept of the modal transformation method to obtain the transformation relationship between strain and displacement by using the matrix solution with displacement and strain vibrations having the same modal coordinates, and verified the effectiveness of the method by conducting experiments on cantilever beams with strain gauges.…”

Section: Introductionmentioning

confidence: 99%

Strain field reconstruction of crossbeam structure based on load–strain linear superposition method

Cheng¹,

Li²,

Wang³

et al. 2021

Smart Mater. Struct.

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To address the problem that sensors cannot be affixed at certain critical locations of the crossbeam structure and the full-field strain distribution cannot be obtained in real-time. In this paper, a strain field reconstruction algorithm based on the load-strain linear superposition method is proposed to reconstruct the strain field distribution of the structure under arbitrary static load in three dimensions using the strain data at a limited number of discrete locations. Especially when the load is unknown, the reconstruction of the strain field is very meaningful. In the elastic range, the strain under multiple loads is the linear superposition of the strain under a single load. By establishing the finite element model, the strain field reconstruction effect of the crossbeam under double loads and three loads is analyzed. The average relative error is 2.8%, 1.6%, 2.2%, and 2.1%, which verifies the accuracy of the algorithm. On this basis, the feasibility of strain field reconstruction is verified in detail by a static load test. The experimental results show that there is a good consistency between them, indicating the effectiveness of the method. Even in the case of a single load, the strain field distribution of the crossbeam structure can be reconstructed in real-time by comparing the measured strain with the simulated strain.

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Dynamic Deformation Reconstruction of Variable Section WING with Fiber Bragg Grating Sensors

Cited by 14 publications

References 12 publications

Displacement field reconstruction technique for plate-like structures based on model superposition method

Displacement field reconstruction technique for plate-like structures based on model superposition method

Special Issue “Fiber Optic Sensors and Applications”: An Overview

Strain field reconstruction of crossbeam structure based on load–strain linear superposition method

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