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In this research, using the energy
approach, a generalized dynamic model is derived for Galfenol (Iron-Gallium
Alloy) based on the mechanical strain theory and the Jiles-Atherton model.
Experiments have been conducted to measure the relationship between the strain
and the magnetic field. Using experimental data, unknown parameters in the
model have been identified by a developed optimization algorithm. Results show
that the novel dynamic model with identified parameters is capable of
describing the performance of the Galfenol rod. Simulation and experiment
dynamic responses of Galfenol rods are derived. The simulation and the
experiment both agree that the magnitude of the strain output decreases with
the increase of the excitation frequency.