Two different numerical methods are presented and compared to identify the radius, the magnetic permeability, and the electrical conductivity of a sphere embedded in a uniform time-varying magnetic field, starting from its time-domain electromagnetic response. The first technique, which has been already applied to this problem, is the Prony method whereas the second one, never experimented in this context, is a matrix pencil method. Numerical experiments, which show a better stability of the second approach, are given and future research prospects are presented.

Time domain electromagnetic response of a conductive and magnetic permeable sphere via exponential sums

Deidda G. P.;Diaz De Alba P.;Fermo L.;Rodriguez G.
2021

Abstract

Two different numerical methods are presented and compared to identify the radius, the magnetic permeability, and the electrical conductivity of a sphere embedded in a uniform time-varying magnetic field, starting from its time-domain electromagnetic response. The first technique, which has been already applied to this problem, is the Prony method whereas the second one, never experimented in this context, is a matrix pencil method. Numerical experiments, which show a better stability of the second approach, are given and future research prospects are presented.
978-1-6654-5843-6
Electromagnetic induction
matrix pencil method
Prony method
time domain electromagnetic (TDEM) method
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/332913
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