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  • Author: Łukasz Knypiński x
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Krzysztof Kowalski, Lech Nowak, Łukasz Knypiński and Paweł Idziak


The paper considers the influence of core saturation on the dynamics of magnetostrictive fast-acting actuator. The field-circuit mathematical model of the dynamic operation of the capacitor-actuator system is applied. Two kinds of magnetostrictive core nonlinearity are taken into account. It has been proved that the saturation of the B-H curve practically does not affect the current, and capacitor voltage waveforms, but significantly affects a core elongation waveform. The computed results are compared with experimental ones.

Open access

Łukasz Knypiński, Lech Nowak, Piotr Sujka and Kazimierz Radziuk

Application of a PSO algorithm for identification of the parameters of Jiles-Atherton hysteresis model

In the paper an algorithm and computer code for the identification of the hysteresis parameters of the Jiles-Atherton model have been presented. For the identification the particle swarm optimization method (PSO) has been applied. In the optimization procedure five design variables has been assumed. The computer code has been elaborated using Delphi environment. Three types of material have been examined. The results of optimization have been compared to experimental ones. Selected results of the calculation for different material are presented and discussed.