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Open AccessArticle

Efficient Sensor Placement Optimization for Shape Deformation Sensing of Antenna Structures with Fiber Bragg Grating Strain Sensors

by 1,†, 1,†, 1,*,† and 2,†
1
Key Laboratory of Electronic Equipment Structure Design, Ministry of Education, Xidian University, Xi’an 710071, China
2
Nanjing Research Institute of Electronic Technology, Nanjing 210039, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2018, 18(8), 2481; https://doi.org/10.3390/s18082481
Received: 5 July 2018 / Revised: 23 July 2018 / Accepted: 23 July 2018 / Published: 1 August 2018
(This article belongs to the Section Physical Sensors)
This paper investigates the problem of an optimal sensor placement for better shape deformation sensing of a new antenna structure with embedded or attached Fiber Bragg grating (FBG) strain sensors. In this paper, the deformation shape of the antenna structure is reconstructed using a strain–displacement transformation, according to the measured discrete strain data from limited FBG strain sensors. Moreover, a two-stage sensor placement method is proposed using a derived relative reconstruction error equation. In this method, the initial sensor locations are determined using the principal component analysis based on orthogonal trigonometric (i.e., QR) decomposition, and then a new location is sequentially added into the initial sensor locations one by one by minimizing the relative reconstruction error considering information redundancy. The numerical simulations are conducted, and the comparisons show that the proposed method is advantageous in terms of the sensor distribution and computational cost. Experimental validation is performed using an antenna experimental platform equipped with an optimal FBG strain sensor configuration, and the reconstruction results show good agreements with those measured directly from displacement sensors. The proposed method has a large potential for the strain sensor placement of complex structures, and the proposed antenna structure with FBG strain sensors can be applied to the future wing-skin antenna or flexible space-based antenna. View Full-Text
Keywords: shape sensing; optimal sensor placement; antenna deformation; Fiber Bragg grating; information redundancy shape sensing; optimal sensor placement; antenna deformation; Fiber Bragg grating; information redundancy
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MDPI and ACS Style

Zhou, J.; Cai, Z.; Zhao, P.; Tang, B. Efficient Sensor Placement Optimization for Shape Deformation Sensing of Antenna Structures with Fiber Bragg Grating Strain Sensors. Sensors 2018, 18, 2481. https://doi.org/10.3390/s18082481

AMA Style

Zhou J, Cai Z, Zhao P, Tang B. Efficient Sensor Placement Optimization for Shape Deformation Sensing of Antenna Structures with Fiber Bragg Grating Strain Sensors. Sensors. 2018; 18(8):2481. https://doi.org/10.3390/s18082481

Chicago/Turabian Style

Zhou, Jinzhu; Cai, Zhiheng; Zhao, Pengbing; Tang, Baofu. 2018. "Efficient Sensor Placement Optimization for Shape Deformation Sensing of Antenna Structures with Fiber Bragg Grating Strain Sensors" Sensors 18, no. 8: 2481. https://doi.org/10.3390/s18082481

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