Time domain modeling of soft faults in wiring system by a nodal Discontinuous Galerkin Method with high-order hexahedral meshes

Abelin Kameni (1) , F Loete (1) , S Ziani (1) , K Kahalerras (1) , Lionel Pichon (1)

1 GeePs - Laboratoire Génie électrique et électronique de Paris

A time domain nodal discontinuous Galerkin method is used to solve Maxwell equations and simulate reflectometry responses of soft faults. In this paper shielding defects of coaxial cables or other shielded lines are considered. Hexahedral high order elements are used for meshing. They allow to avoid bulky meshes compared to tetrahedral elements. A gaussian pulse is injected on the faulty line. The reflectogram of the line containing the chafing soft defect is obtained and parameters such as the reflection coefficient or the characteristic impedance of the fault are computed. These numerical values are compared to those obtained in experimental investigations. The experimental impedances estimated using a classical transmission matrix method are in very good agreement with those obtained by three-dimensional modeling.

Mots clés: Maxwell's equations; Discontinuous Galerkin Method; Hexahedral meshes; Wire fault modeling; Reflectometry diagnosis

Domaines: Electromagnétisme

Abelin Kameni, F Loete, S Ziani, K Kahalerras, Lionel Pichon. Time domain modeling of soft faults in wiring system by a nodal Discontinuous Galerkin Method with high-order hexahedral meshes. COMPUMAG 2015, Jun 2015, MONTREAL, Canada. ⟨hal-01236028⟩