Title :
Crack sizing methodologies using trust region method arising in Eddy current testing
Author :
Kojima, Fumio ; Soen, Yuka
Author_Institution :
Grad. Sch. of Eng., Kobe Univ., Kobe
Abstract :
This paper is concerned with performance evaluation of output least square minimization related to an electromagnetic nondestructive evaluation for nuclear power plants. First, our inverse methodology is formulated as a least square minimization based on trust region algorithm. Secondly, the method is applied to a parameter estimation problem for crack sizing using eddy current signals. Equality constraints with Eddy current model and additional fixed interval constraints of unknown parameters are subjected to the nonlinear optimization. Finally, some computational experiments will be demonstrated for various optional features of the trust region method.
Keywords :
crack detection; eddy current testing; least squares approximations; nonlinear programming; nuclear power stations; performance evaluation; crack sizing methodology; eddy current testing; electromagnetic nondestructive evaluation; equality constraints; fixed interval constraints; nonlinear optimization; nuclear power plants; output least square minimization; performance evaluation; trust region algorithm; trust region method; Eddy current testing; Eddy currents; Least squares approximation; Least squares methods; Mathematical model; Minimization methods; Nondestructive testing; Optimization methods; Parameter estimation; Power engineering and energy; Identification; Nondestructive testing; Optimization; Parameter estimation;
Conference_Titel :
SICE Annual Conference, 2008
Conference_Location :
Tokyo
Print_ISBN :
978-4-907764-30-2
Electronic_ISBN :
978-4-907764-29-6
DOI :
10.1109/SICE.2008.4654711
