Reconstruction of magnetic charges using an optimization method and waveled

Chen, Z.; not registered ; not registered 

As a part efforts to establish a passive nondestructive testing method using leakage magnetic field,the magnetic charges caused by mechanical damages are reconstructed in this paper from measured leakage field date with use of methods in deterministic category.Concerning the bad condition number of this typical ill-posed inverse problem,an optimization approach is adopted for solving the unknown magnetic parameters in which the designation of initial profiles,weight coefficients and total number of iterations were taken as means of regularization.Moreover,for improving robustness against noise, a Galerkin procedure with base function chosen as the Daubiches'wavelet isalso introduced for discretizing the governing equations.Reconstruction with the proposed methods is practically practically