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This paper presents the activity of a Distributed Measurement Laboratory on a challenging topic: the characterization of current distribution in electromagnetic rail launchers. Such experiments are characterized by strong transient magnetic fields, very fast moving conductors and the use of pulsed power in the GW range. Due to the high complexity of the investigated phenomenon an international network...
The aim of this paper is to evaluate the magnetic properties and losses of the Fe-9Cr steel under nonperiodic conditions of the magnetic field. A first series of measurements is performed for characterizing the quasi-static major loop and various dynamic cycles obtained at different rate of the driving magnetic field H. Then, a series of “ad-hoc” experiments is defined in order to provide a good basis...
This paper presents the application of a measurement procedure for improving data acquisition for the characterization of soft magnetic ferrites. The approach is based on a voltamperometric technique and is aimed at better measure minor asymmetric cycles improving the quality and resolution of measurement data. Physical and mathematical conditions require the use of current and voltage signals with...
The Dual Resonance Non Linear (DRNL) filter bank is a powerful model of the human cochlear behavior successfully applied to cochlear implants. This study is aimed to the implementation of an algorithm for using this model in the processing of speech for external hearing aid devices.
We reapproach the characterization of the inductance gradient and the current distribution in electromagnetic rail launchers with multiple brush armatures. A measurement procedure based on the use of a loop system mutually coupled with the launcher is illustrated for the case of a two-brush armature. We show how to estimate the current distribution between the brushes following the basic rules of...
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