잡음 환경 하에서의 전기-역학적 임피던스 기반 조류발전 구조물의 장기 건전성 모니터링 KCI

Title
잡음 환경 하에서의 전기-역학적 임피던스 기반 조류발전 구조물의 장기 건전성 모니터링
Alternative Title
Impedance-based Long-term Structural Health Monitoring for Tidal Current Power Plant Structure in Noisy Environments
Author(s)
민지영; 심효진; 윤정방; 이진학
KIOST Author(s)
Yi, Jin Hak(이진학)
Publication Year
2011-08
Abstract
In structural health monitoring (SHM) using electro-mechanical impedance signatures, it is a critical issue for extremely large structures to extract the best damage diagnosis results, while minimizing unknown environmental effects, including temperature, humidity, and acoustic vibration. If the impedance signatures fluctuate because of these factors, these fluctuations should be eliminated because they might hide the characteristics of the host structural damages. This paper presents a long-term SHM technique under an unknown noisy environment for tidal current power plant structures. The obtained impedance signatures contained significant variations during the measurements, especially in the audio frequency range. To eliminate these variations, a continuous principal component analysis was applied, and the results were compared with the conventional approach using the RMSD (Root Mean Square Deviation) and CC (Cross-correlation Coefficient) damage indices. Finally, it was found that this approach could be effectively used for long-term SHM in noisy environments.
ISSN
1225-0767
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1782
Bibliographic Citation
한국해양공학회지, v.25, no.4, pp.59 - 65, 2011
Publisher
한국해양공학회
Keywords
Piezoelectric sensors; Electro-mechanical impedance; Long-term structural health monitoring; Noisy environment; Principal component analysis; 압전센서; 전기-역학적 임피던스; 장기 구조물 건전성 모니터링; 잡음 환경; 주성분 분석
Type
Article
Language
Korean
Publisher
한국해양공학회
Related Researcher
Research Interests

Ocean Energy-Tidal Current Energy Converter System,Infrastructure Management-Structural Health Monitoring,Offshore Wind,해양에너지-조류발전시스템,시설물 유지관리-구조건전성 평가,해상풍력

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