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.

diaz de alba, patricia
;
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.
Electromagnetic induction, time domain electro- magnetic (TDEM) method, Prony method, matrix pencil method.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/24202
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