Solution of nonlinear magnetic field problems by Krylov-subspace methods with η-cycle wavelet based algebraic multigrid preconditioning

Authors

  • Fabio Henrique Pereira Uninove, SP
  • Silvio Ikuyo Nabeta Escola Politécnica da Universidade de São Paulo

DOI:

https://doi.org/10.5585/exacta.v7i2.1617

Keywords:

Campos Magnéticos. Método dos Elementos Finitos. Métodos no Subespaço de Krylov. Multigrid Algébrico baseado em Wavelet. Pré-condicionadores.

Abstract

In this work the performance of -cycle wavelet-based algebraic multigrid preconditioner for iterative methods is investigated. The method is applied as a preconditioner for the classical iterative methods Bi-Conjugate Gradient Stabilized (BiCGStab), Generalized Minimum Residual (GMRes) and Conjugate Gradient (CG) to the solution of non-linear system of algebraic equations from the analysis of a switched reluctance motor with ferromagnetic material the steel S45C and nonlinear magnetization curve, associated with the Newton-Raphson algorithm. Particular attention has been focused in both V- and W-cycle convergence factors, as well as the CPU time. Numerical results show the efficiency of the proposed techniques when compared with classical preconditioner, such as Incomplete Cholesky and Incomplete LU decomposition.

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Author Biographies

Fabio Henrique Pereira, Uninove, SP

Professor/Pesquisador do Programa de Mestrado em Engenharia de Produção da Universidade Nove de Julho - Uninove.

Silvio Ikuyo Nabeta, Escola Politécnica da Universidade de São Paulo

Professor/Pesquisador do Departamento de Engenharia de Energia e Automação Elétricas da Escola Politécnica da Universidade de São Paulo (PEA/EPUSP). Coordenador do Grupo de Máquinas e Acionamentos Elétricos (GMAcq).

Published

2010-02-07

How to Cite

Pereira, F. H., & Nabeta, S. I. (2010). Solution of nonlinear magnetic field problems by Krylov-subspace methods with η-cycle wavelet based algebraic multigrid preconditioning. Exacta, 7(2), 173–180. https://doi.org/10.5585/exacta.v7i2.1617