Reliability assessment of measurement accuracy for FBG sensors used in structural tests of the wind turbine blades based on strain transfer laws

Liu, Zheng; Liu, Xin; Zhu, Shun‐Peng; Zhu, Pingyu; Liu, Waixi; Correia, José A.F.O.; Jesus, Abílio M.P. De

doi:10.1016/j.engfailanal.2020.104506

Cited by 29 publications

(14 citation statements)

References 15 publications

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“…The adhesive types, the size of the bonding layer, the stress conditions during the fatigue test, etc., will affect the bonding performance. Though the influence of the bonding process on the measurement accuracy of FBG sensors has been studied previously [8,10], a unified pasting process has not been formed at present. For CC, CC-FM17 (with a total of 9.56% RPN shares) is the main failure mode.…”

Section: Resultsmentioning

confidence: 99%

“…According to the literature, the quality and performance of packaged FBG sensors are not stable in practice; consequently, the reliability analysis of FBG-packaged sensors is very important. Our previous study [10] showed that the bonding layer greatly affects the strain transfer ratio of the CFRP-packaged FBG sensors applied in WTB full-scale structural testing, and the reliability of the CFRP-packaged FBG sensors are influenced by adhesive types, adhesive thickness, etc. However, the study only considered the influence of the bonding layer, and ignored the influences of the packaged layer, welding quality, inherent reliability of FBG sensors, etc.…”

Section: Introductionmentioning

confidence: 99%

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Reliability Analysis of CFRP-Packaged FBG Sensors Using FMEA and FTA Techniques

Liu

Zhang

et al. 2021

Applied Sciences

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Carbon fiber-reinforced plastics (CFRP)-packaged fiber Bragg grating (FBG) sensors are widely used in full-scale structural testing of wind turbine blades (WTBs). However, the specific process to make CFRP-packaged FBG sensors, such as packaging, bonding, welding, etc., are mainly manually operated, and no unified standard or rule has been formed yet. Non-standard specific processes, coupled with complex stress distribution, unstable working environments, etc., result in the CFRP-packaged FBG sensors having various failures with time, resulting in inaccurate measurements. Thus, the need to carry out related failure analysis is urgent. This paper therefore performed a reliability analysis for CFRP-packaged FBG sensors using failure mode and effects analysis (FMEA) and fault tree analysis (FTA) techniques. The results provide an important basis towards analyzing performance degradation and functional failures for CFRP-packaged FBG sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability Analysis of CFRP-Packaged FBG Sensors Using FMEA and FTA Techniques

Liu

Zhang

et al. 2021

Applied Sciences

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“…FBG sensors can be mounted on structure surfaces [6][7][8], as well as embedded into the material during its manufacturing [9,10]. At present, FBG sensors are integral parts of the SHM systems installed on different structures: bridges [10], offshore platforms [11][12][13], buildings [14][15][16], marine vessels [9,17,18]. In aircraft structures, FBG sensors are mostly used to monitor fuselage parts [19][20][21], aircraft cockpit [6] or composite wings [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Among the many analyses, the possibility of applying the FBG sensors to strain measurement during fatigue loading and damage detection was considered, to validate of the utility of the sensors. Liu et al [11] analysed the utility of FBG sensors embedded into a composite material (in a form of a package) and attached to a wind turbine blade for the strain variation monitoring under static and fatigue tests. It was observed that the parameters (length, thickness) of the joint between the package and the blade strongly influenced the strain transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Propagation Monitoring Using Fibre Bragg Grating Sensors

Mieloszyk

2021

Vibration

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The paper presents the analysis of the possibility of fatigue crack detection and monitoring its propagation process using fibre Bragg grating (FBG) sensors. The investigations were carried out on an aluminium alloy sample (a part of the Mi-2 helicopter rotor blade). During the fatigue test, the sample was equipped with FBG sensors applied for strain measurement and the vibration-based strain monitoring. It was observed that the strain curves determined by the FBG sensors agreed well with the fatigue force profile. However, the strain curves were almost insensitive to the crack propagation process, except in the last stage of the test, when the crack length was equal to 25 mm. The strain values and the natural frequencies of the sample that were determined experimentally were compared with the values achieved from the finite element method model, with both methods showing good agreement. Additionally, spectrogram-based analyses were performed, focused on the acoustic waves phenomena related to a crack propagation process. It was confirmed that the proposed signal processing method, based on spectrogram analyses, can be applied for the detection of fatigue crack development in metal structures.

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“…According to the above problems based on the reliability theory dealing with uncertainties [25], a comprehensive human reliability evaluation index system for working control interface design based on relevant research is established [26,27]. e ergonomic reliability must balance the quantification of objective and subjective uncertainties [28].…”

Section: Introductionmentioning

confidence: 99%

Human Reliability Evaluation Based on Objective and Subjective Comprehensive Method Used for Ergonomic Interface Design

Liu

Chen

et al. 2021

Mathematical Problems in Engineering

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In the process of machining, the operator’s incorrect operation using the control human-computer interaction interface may lead to a disastrous effect on the whole production chain such as task failure and system failure. The eight types of using errors about human-computer interaction interface system (misperception, memory lapse, carelessness, improper decision-making, improper operation, improper interface layout design, improper icon and text display design, and improper prompt feedback) are proposed based on the cognition from users. According to the eight types of using error, the human reliability and safety evaluation method is proposed. Considering the variability objective and uncertainty subjective factors in the human-machine interaction process, the human reliability evaluation method is proposed based on objective and subjective comprehensive weighting under ergonomic principles. Firstly, based on the investigation of relevant machine tool interface design, the comprehensive evaluation index system for man-machine reliability of complex interface design is established. Secondly, an objective and subjective comprehensive weight assignment method as the composition of Theilʼs entropy weight method combined with TOPSIS (Technique for Order Preference by Similarity to an Ideal Solution) and improved AHP (analytic hierarchy process) method combined with fuzzy mathematics is proposed. It can not only effectively avoid the impact of excessive subjective factors on empowerment but also fully excavate the real information in the survey data and improve the objectivity and accuracy of the weight data of evaluation indicators at all levels. Thirdly, taking the interface design of CNC machine tool equipment for example, the best human-computer interaction interface design schemes are chosen according to the human reliability evaluation method based on objective and subjective comprehensive method calculated by Entropy-TOPSIS-AHP. Finally, based on eye movement experiments, the use efficiency and accuracy of the human-computer interaction interface design scheme chosen by the assessment method are better than the other design schemes or original one to verify the assessment method validity.

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Reliability assessment of measurement accuracy for FBG sensors used in structural tests of the wind turbine blades based on strain transfer laws

Cited by 29 publications

References 15 publications

Reliability Analysis of CFRP-Packaged FBG Sensors Using FMEA and FTA Techniques

Reliability Analysis of CFRP-Packaged FBG Sensors Using FMEA and FTA Techniques

Fatigue Crack Propagation Monitoring Using Fibre Bragg Grating Sensors

Human Reliability Evaluation Based on Objective and Subjective Comprehensive Method Used for Ergonomic Interface Design

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