풍력터빈 구조물에 대한 센서 융합 기반의 온도변화에 강건한 손상지수의 개발

Title
풍력터빈 구조물에 대한 센서 융합 기반의 온도변화에 강건한 손상지수의 개발
Alternative Title
Development of temperature-robust damage factor based on sensor fusion for a wind turbine structure
Author(s)
박종웅; 심성한; 정병진; 이진학; 정형조
KIOST Author(s)
Yi, Jin Hak(이진학)
Publication Year
2014-07-17
Abstract
Wind power systems have gained much attention due to the relatively high reliability, maturity in technology and cost competitiveness compared to other renewable alternatives. Advances have been made to increase the power efficiency of the wind turbines while less attention has been focused on structural integrity assessment of the structural systems. Vibration-based damage detection has widely been researched to identify damages on a structure based on change in dynamic characteristics. Widely spread methods are natural frequency-based, mode shape-based, and curvature mode shape-based methods. The natural frequency-based methods are convenient but vulnerable to environmental temperature variation which degrades damage detection capability mode shapes are less influenced by temperature variation and able to locate damage but requires extensive sensor instrumentation which is costly and vulnerable to signal noises. This study proposes novelty of damage factor based on sensor fusion to exclude effect of temperature variation. The combined use of an accelerometer and an inclinometer was considered and damage factor was defined as a change in relationship between those two measurements. The advantages of the proposed method are: (1) requirement of small number of sensor, (2) robustness to change in temperature and signal noise and (3) ability to roughly locate damage. Validation of the proposed method is carried wind turbines while less attention has been focused on structural integrity assessment of the structural systems. Vibration-based damage detection has widely been researched to identify damages on a structure based on change in dynamic characteristics. Widely spread methods are natural frequency-based, mode shape-based, and curvature mode shape-based methods. The natural frequency-based methods are convenient but vulnerable to environmental temperature variation which degrades damage detection capability mode shapes are less influenced by temperature variation and able to locate damage but requires extensive sensor instrumentation which is costly and vulnerable to signal noises. This study proposes novelty of damage factor based on sensor fusion to exclude effect of temperature variation. The combined use of an accelerometer and an inclinometer was considered and damage factor was defined as a change in relationship between those two measurements. The advantages of the proposed method are: (1) requirement of small number of sensor, (2) robustness to change in temperature and signal noise and (3) ability to roughly locate damage. Validation of the proposed method is carried
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26090
Bibliographic Citation
Proceedings of the 6th World Conference on Structural Control and Monitoring, pp.3355 - 3361, 2014
Publisher
IASCM
Type
Conference
Language
English
Publisher
IASCM
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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