Journal ArticleDOI
Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring
TLDR
In this paper, the state-of-the-art in piezoelectric-wafer active sensors structural health monitoring and damage detection is reviewed, and two main detection strategies are considered: the E/M impedance method for near field damage detection, and wave propagation methods for far-field damage detection.Abstract:
Piezoelectric wafer active sensors may be applied on aging aircraft structures to monitor the onset and progress of structural damage such as fatigue cracks and corrosion. The state of the art in piezoelectric-wafer active sensors structural health monitoring and damage detection is reviewed. Methods based on (a) elastic wave propagation and (b) the Electro–Mechanical (E/M) impedance technique are cited and briefly discussed. For health monitoring of aging aircraft structures, two main detection strategies are considered: the E/M impedance method for near field damage detection, and wave propagation methods for far-field damage detection. These methods are developed and verified on simple-geometry specimens and on realistic aging aircraft panels with seeded cracks and corrosion. The experimental methods, signal processing, and damage detection algorithms are tuned to the specific method used for structural interrogation. In the E/M impedance method approach, the high-frequency spectrum, representative of the structural resonances, is recorded. Then, overallstatistics damage metrics can be used to compare the impedance signatures and correlate the change in these signatures with the damage progression and intensity. In our experiments, the (1 � R 2 ) 3 damage metric was found to best fit the results in the 300–450 kHz band. In the wave propagation approach, the pulse-echo and acousto-ultrasonic methods can be utilized to identify the additional reflections generated from crack damage and the changes in transmission phase and velocity associated with corrosion damage. The paper ends with a conceptual design of a structural health monitoring system and suggestions for aging aircraft installation utilizing active-sensor arrays, data concentrators, wireless transmission, and a health monitoring and processing unit.read more
Citations
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Journal ArticleDOI
Overview of Piezoelectric Impedance-Based Health Monitoring and Path Forward
TL;DR: In this article, Niezrecki et al. summarized the hardware and software issues of impedance-based structural health modi- toring based on piezoelectric materials.
Journal ArticleDOI
Wind Turbine Condition Monitoring: State-of-the-Art Review, New Trends, and Future Challenges
Pierre Tchakoua,Rene Wamkeue,Mohand Ouhrouche,Fouad Slaoui-Hasnaoui,Tommy Andy Tameghe,Gabriel Ekemb +5 more
TL;DR: In this article, a general review and classification of wind turbine condition monitoring methods and techniques with a focus on trends and future challenges is provided, and interesting insights from this research are used to point out strengths and weaknesses in today's WTCM industry and define research priorities needed for the industry to meet the challenges in wind industry technological evolution and market growth.
Journal ArticleDOI
Energy Harvesting for Structural Health Monitoring Sensor Networks
TL;DR: Some future research directions that are aimed at transitioning the concept of energy harvesting for embedded SHM sensing systems from laboratory research to field-deployed engineering prototypes are defined.
Journal ArticleDOI
An overview of stretchable strain sensors from conductive polymer nanocomposites
Jianwen Chen,Jianwen Chen,Qunli Yu,Xihua Cui,Mengyao Dong,Mengyao Dong,Jiaoxia Zhang,Jiaoxia Zhang,Chao Wang,Jincheng Fan,Yutian Zhu,Zhanhu Guo +11 more
TL;DR: In this article, the authors systematically summarize the recent progress of stretchable strain sensors based on flexible conductive polymer composites (FCPCs) composed of conductive materials and a stretchable elastomer.
Journal ArticleDOI
Performance assessment and validation of piezoelectric active-sensors in structural health monitoring
TL;DR: A sensor diagnostics and validation process that performs in situ monitoring of the operational status of piezoelectric active-sensors in structural health monitoring (SHM) applications is presented in this article.
References
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