Fuzzy regularization method for ill-posed problems on ECT with Laplace transform BEM

Author

Tsuchida, Yuji ; Enokizono, Masato

Author_Institution

Dept. of Electr. & Electron. Eng., Oita Univ., Japan

Volume

36

Issue

4

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

1158

Lastpage

1162

Abstract

This paper presents an identification method of crack shapes on eddy current testing. In order to use the impulse excitation, numerical analysis is performed by the boundary element method with Laplace transform. The shapes of cracks are identified directly from the integral equation of BEM. The singular value decomposition and regularization method by means of fuzzy inference are applied in the coefficient matrix for the unknown variables to obtain proper crack shapes

Keywords

Laplace transforms; boundary integral equations; boundary-elements methods; crack detection; eddy current testing; fuzzy set theory; singular value decomposition; ECT; Laplace transform BEM; coefficient matrix; crack shapes; eddy current testing; fuzzy regularization method; identification method; ill-posed problems; impulse excitation; integral equation; singular value decomposition; Boundary element methods; Electrical capacitance tomography; Integral equations; Laplace equations; Magnetic flux; Magnetic sensors; Matrix decomposition; Numerical analysis; Shape; Singular value decomposition;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.877646

Filename

877646