Title :
On a linearized inverse scattering model for a three-dimensional flaw embedded in anisotropic advanced composite materials
Author :
Barkeshli, Sina ; Radecki, Denis J. ; Sabbagh, Harold A.
Author_Institution :
Sabbagh Associates Inc., Bloomington, IN, USA
fDate :
1/1/1992 12:00:00 AM
Abstract :
A three-dimensional linearized model to reconstruct the flaw in advanced anisotropic composite materials is developed. The inversion scheme takes the form of an integral equation, which is discretized by means of the method of moments. The measured data are then inverted by means of the conjugate gradient (CG) fast Fourier transform algorithm, which incorporates Levenberg-Marquardt regularization and adaptive preconditioning schemes. The reconstruction of the flaw based on simulated as well as measured data, along with some of the salient features of the newly developed CG algorithm are presented
Keywords :
composite materials; flaw detection; Levenberg-Marquardt regularization; adaptive preconditioning; anisotropic advanced composite materials; conjugate gradient algorithm; fast Fourier transform algorithm; inversion scheme; linearized inverse scattering model; method of moments; three-dimensional flaw; Anisotropic magnetoresistance; Approximation methods; Character generation; Composite materials; Conductivity; Integral equations; Inverse problems; Least squares approximation; Permittivity; Scattering;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
