Efficiency Improvement of Integral Formulation via
Sami Barmada, Antonino Musolino, Rocco Rizzo · 2003
The characteristic of multiresolution analysis is ap- plied to the solution of the large dense equation systems arising from the analysis of nonlinear electromagnetic devices via inte- gral methods. An integral formulation for nonlinear low-frequency problems, based on the construction of an equivalent network, is here used to illustrate the procedure and to investigate its effec- tiveness and reliability. The nonlinear system is discretized and the wavelet transform applied to the unknowns leads to a sparse system, hence to a more efficient numerical solution. Index Terms—Integral methods, nonlinear systems, wavelet transform.