Experimental Validation of a Structural Health Monitoring Methodology: Part Iii. Damage Location on an Aircraft Wing

Damage localization using transmissibility functions: A critical review

“…In this contribution, outlier analysis based on frequency lines in the TFs was used for damage detection. A few years later, experimental validations on the use of TFs for damage detection ( [15], [16] and [17]) and localization [18] have been performed using vibration data from a laboratory wing box structure and a gnat aircraft wing. Detection was based on three different novelty detection techniques (outlier analysis, auto-associative neural networks and kernel density estimation), while localization was based on supervised learning using a multi-layer perception (MLP) neural network.…”

“…For damage detection, one should find the frequency bands for which the features are highly sensitive to damage and insensitive to variability in the normal condition [15]- [16]. For damage localization, an additional requirement is to find frequency bands in which the features are highly sensitive to one type of damage, and almost insensitive to the others [18]. A major problem is that these frequency bands cannot be determined a priori without having access to data from the structure in the different damage conditions and that in practice, such data is rarely available.…”

Vibration-based monitoring of civil infrastructure: challenges and successes

“…foundation piles (Lilley et al, 1982) but has been attempted (with very limited success) on a wider range of civil structures, with variations on the technique investigated by many researchers. VBDD has had a more successful track record in aerospace engineering (Manson et al, 2003) where damage detection remains a viable technology. Like successful practical applications to foundation pile integrity testing, VBDD applications in aerospace rely less on modal parameter changes and more on wave transmission and reflection.…”

Advanced Feature Selection for Simplified Pattern Recognition within the Damage Identification Framework

“…The first author was involved in a body of research, funded by DERA/QinetiQ [1][2][3][4], on Structural Health Monitoring (SHM) which proposed a health monitoring system based upon novelty detection techniques. The aim of this overall body of research was to make as much progress as possible up the hierarchical fault detection structure [5] whilst retaining, or even improving, the robustness of the lower level solutions.…”

“…The next two parts [3,4] extended these techniques to levels 2 and 3 in the damage hierarchy, respectively. These were also conducted on the wing of the Gnat aircraft.…”