Campus Units

Civil, Construction and Environmental Engineering, Electrical and Computer Engineering

Document Type

Article

Publication Version

Published Version

Publication Date

9-27-2015

Journal or Book Title

Shock and Vibration

Volume

2562949

First Page

1

Last Page

13

DOI

10.1155/2016/2562949

Abstract

Structural health monitoring of large systems is a complex engineering task due to important practical issues. When dealing with large structures, damage diagnosis, localization, and prognosis necessitate a large number of sensors, which is a nontrivial task due to the lack of scalability of traditional sensing technologies. In order to address this challenge, the authors have recently proposed a novel sensing solution consisting of a low-cost soft elastomeric capacitor that transduces surface strains into measurable changes in capacitance. This paper demonstrates the potential of this technology for damage detection, localization, and prognosis when utilized in dense network configurations over large surfaces. A wind turbine blade is adopted as a case study, and numerical simulations demonstrate the effectiveness of a data-driven algorithm relying on distributed strain data in evidencing the presence and location of damage, and sequentially ranking its severity. Numerical results further show that the soft elastomeric capacitor may outperform traditional strain sensors in damage identification as it provides additive strain measurements without any preferential direction. Finally, simulation with reconstruction of measurements from missing or malfunctioning sensors using the concepts of virtual sensors and Kriging demonstrates the robustness of the proposed condition assessment methodology for sparser or malfunctioning grids.

Comments

This article is from Shock and Vibration, 2016, Article ID 2562949; 1-13. DOI: 10.1155/2016/2562949. Posted with permission

Copyright Owner

Simon Laflamme et al.

Language

en

File Format

application/pdf