Document Type

Conference Proceeding

Publication Date

2003

Journal or Book Title

AIP Conference Proceedings

Volume

657

First Page

742

Last Page

749

DOI

10.1063/1.1570210

Abstract

A numerical scheme for finding crack shapes from eddy current measurements has been developed based on a startdard iterative inversion approach in which a nonlinear least squares objective function quantifying the overall difference between predictions and measurements is minimized. In this paper, steepest descent and conjugate‐gradient methods for minimizing the objective function are investigated and compared. Cramér‐Rao lower bounds on the crack parameters are derived to quantify the accuracy of the estimated crack shape. Cramér‐Rao bounds are also used to indicate improvements in the design of eddy‐current nondestructive evaluation systems.

Comments

The following article appeared in AIP Conference Proceedings 657 (2003): 742 and may be found at doi:10.1063/1.1570210.

Rights

Copyright 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Copyright Owner

American Institute of Physics

Language

en

File Format

application/pdf

Share

COinS