Abstract
Conventional triangulation techniques fail to correctly predict the acoustic source location in anisotropic plates due to the direction dependent nature of the elastic wave speeds. To overcome this problem, Kundu et al. [1] proposed an alternative method for acoustic source prediction based on optimizing an objective function. They defined an objective function that uses the time of flight information of the acoustic waves to the passive transducers attached to the plate and the wave propagation direction (θ) from the source point to the receiving sensors. Some weaknesses of the original algorithm proposed in Ref. [1] were later overcome by developing a modified objective function [2]. A new objective function is introduced here to further simplify the optimization procedure and improve the computational efficiency. A new algorithm for source location is also introduced here to increase the source location accuracy. The performance of the objective function and source location algorithm were experimentally verified on a homogeneous anisotropic plate and a non-homogeneous anisotropic plate with a doubler patch. Results from these experiments indicate that the new objective function and source location algorithm have improved performance when compared with those discussed in Refs. [1,2].
| Original language | English (US) |
|---|---|
| Pages (from-to) | 317-324 |
| Number of pages | 8 |
| Journal | Ultrasonics |
| Volume | 51 |
| Issue number | 3 |
| DOIs | |
| State | Published - Apr 2011 |
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Keywords
- Composite plate
- Guided wave propagation
- Impact point detection
- Optimization
- Plate monitoring
ASJC Scopus subject areas
- Acoustics and Ultrasonics
Cite this
An improved algorithm for detecting point of impact in anisotropic inhomogeneous plates. / Hajzargerbashi, Talieh; Kundu, Tribikram; Bland, Scott.
In: Ultrasonics, Vol. 51, No. 3, 04.2011, p. 317-324.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - An improved algorithm for detecting point of impact in anisotropic inhomogeneous plates
AU - Hajzargerbashi, Talieh
AU - Kundu, Tribikram
AU - Bland, Scott
PY - 2011/4
Y1 - 2011/4
N2 - Conventional triangulation techniques fail to correctly predict the acoustic source location in anisotropic plates due to the direction dependent nature of the elastic wave speeds. To overcome this problem, Kundu et al. [1] proposed an alternative method for acoustic source prediction based on optimizing an objective function. They defined an objective function that uses the time of flight information of the acoustic waves to the passive transducers attached to the plate and the wave propagation direction (θ) from the source point to the receiving sensors. Some weaknesses of the original algorithm proposed in Ref. [1] were later overcome by developing a modified objective function [2]. A new objective function is introduced here to further simplify the optimization procedure and improve the computational efficiency. A new algorithm for source location is also introduced here to increase the source location accuracy. The performance of the objective function and source location algorithm were experimentally verified on a homogeneous anisotropic plate and a non-homogeneous anisotropic plate with a doubler patch. Results from these experiments indicate that the new objective function and source location algorithm have improved performance when compared with those discussed in Refs. [1,2].
AB - Conventional triangulation techniques fail to correctly predict the acoustic source location in anisotropic plates due to the direction dependent nature of the elastic wave speeds. To overcome this problem, Kundu et al. [1] proposed an alternative method for acoustic source prediction based on optimizing an objective function. They defined an objective function that uses the time of flight information of the acoustic waves to the passive transducers attached to the plate and the wave propagation direction (θ) from the source point to the receiving sensors. Some weaknesses of the original algorithm proposed in Ref. [1] were later overcome by developing a modified objective function [2]. A new objective function is introduced here to further simplify the optimization procedure and improve the computational efficiency. A new algorithm for source location is also introduced here to increase the source location accuracy. The performance of the objective function and source location algorithm were experimentally verified on a homogeneous anisotropic plate and a non-homogeneous anisotropic plate with a doubler patch. Results from these experiments indicate that the new objective function and source location algorithm have improved performance when compared with those discussed in Refs. [1,2].
KW - Composite plate
KW - Guided wave propagation
KW - Impact point detection
KW - Optimization
KW - Plate monitoring
UR - http://www.scopus.com/inward/record.url?scp=78650965551&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650965551&partnerID=8YFLogxK
U2 - 10.1016/j.ultras.2010.10.005
DO - 10.1016/j.ultras.2010.10.005
M3 - Article
C2 - 21111437
AN - SCOPUS:78650965551
VL - 51
SP - 317
EP - 324
JO - Ultrasonics
JF - Ultrasonics
SN - 0041-624X
IS - 3
ER -