Dynamic Time Warping Temperature Compensation for Guided Wave Structural Health Monitoring
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TLDR
The dynamic time warping is more robust to the above-mentioned errors and more accurately detects damage with weak ultrasonic signatures and is compared with stretch-based methods.Abstract:
Guided wave structural health monitoring is widely researched for remotely inspecting large structural areas. To detect, locate, and characterize damage, guided wave methods often compare data to a baseline signal. Yet, environmental variations create large differences between the baseline and the collected measurements. These variations hide damage signatures and cause false detection. Temperature compensation algorithms, such as baseline signal stretch and the scale transform have been used to optimally realign data to a baseline. While these methods are effective in some conditions, their performance deteriorates in the presence of large temperature variations, long propagation distances, and high frequencies. In this paper, we use dynamic time warping to better align guided wave data and to overcome these errors. When compared with stretch-based methods, we show that the dynamic time warping is more robust to the above-mentioned errors and more accurately detects damage with weak ultrasonic signatures.read more
Citations
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Journal ArticleDOI
Environmental and operational conditions effects on Lamb wave based structural health monitoring systems: A review
Rahim Gorgin,Ying Luo,Zhanjun Wu +2 more
TL;DR: A state of the art review of the effects of EOCs parameters including: temperature, moisture, load, vibration and bonding (adhesive layer shear modulus and thickness, bond defects), on Lamb wave propagation is provided.
Journal ArticleDOI
Open Guided Waves: online platform for ultrasonic guided wave measurements:
Jochen Moll,Jens Kathol,Claus-Peter Fritzen,Maria Moix-Bonet,Marcel Rennoch,Michael Koerdt,Axel S. Herrmann,Markus G. R. Sause,Martin Bach +8 more
TL;DR: In this article, the authors used ultrasonic guided waves to detect damage in isotropic and composite materials with simple and complex geometry, but the limitation of this method was that it was not suitable for structural health monitoring systems.
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Temperature affected guided wave propagation in a composite plate complementing the Open Guided Waves Platform
TL;DR: This paper investigates a carbon fiber reinforced plastic (CFRP) plate that was fully characterized in previous research in terms of stiffness tensor and guided wave propagation and uses it for the analysis of the temperature effect for a wide range of ultrasound frequencies and temperatures.
Journal ArticleDOI
EventDTW: An Improved Dynamic Time Warping Algorithm for Aligning Biomedical Signals of Nonuniform Sampling Frequencies
Yihang Jiang,Yuankai Qi,Will Ke Wang,Brinnae Bent,Robert Avram,Jeffrey E. Olgin,Jessilyn Dunn +6 more
TL;DR: This work proposes a DTW algorithm called EventDTW which uses information propagated from defined events as basis for path matching and hence sequence alignment and develops two metrics, the error rate (ER) and the singularity score (SS), to define and evaluate alignment quality and to enable comparison of performance across DTW algorithms.
Journal ArticleDOI
A focusing MUSIC algorithm for baseline-free Lamb wave damage localization
TL;DR: Based on the virtual time reversal technique, the dispersive wave packets adaptively back propagate according to their respective propagation distances so that the dispersion can be completely compensated and focusing signals are obtained.
References
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Book
Information Retrieval for Music and Motion
TL;DR: Analysis and Retrieval Techniques for Music Data, SyncPlayer: An Advanced Audio Player, and Relational Features and Adaptive Segmentation.
Journal ArticleDOI
The interaction of Lamb waves with defects
D. N. Alleyne,Peter Cawley +1 more
TL;DR: The results indicate that Lamb waves may be used to find notches when the wavelength to notch depth ratio is on the order of 40, and the 2-D Fourier transform method is used to quantify Lamb wave interactions with defects.
Journal ArticleDOI
Damage detection in composite materials using lamb wave methods
TL;DR: In this article, the authors presented an experimental and analytical survey of candidate methods for in situ damage detection of composite materials, including delamination, transverse ply cracks and through-holes.
Scaling up Dynamic Time Warping for Datamining Application
TL;DR: In this paper, a modification of DTW, called Piecewise Aggregate Approximation (PAA), is proposed to improve the robustness of time series distance calculation with no loss of accuracy.
Proceedings ArticleDOI
Scaling up dynamic time warping for datamining applications
Eamonn Keogh,Michael J. Pazzani +1 more
TL;DR: This paper introduces a modification of DTW which operates on a higher level abstraction of the data, in particular, a Piecewise Aggregate Approximation (PAA) which allows us to outperform DTW by one to two orders of magnitude, with no loss of accuracy.
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