Abstract
The modeling of magnetization in magnetostrictive materials is studied in this article. Magnetostrictive materials elongate in the presence of a magnetic field, and can be useful as actuators. These materials are highly nonlinear, and hence, difficult to control. Accurate models are important to the development of stabilizing controllers with good performance. Here, Terfenol-D, a commonly used magnetostrictive material, is studied. A setup is designed to measure magnetic flux density and stress applied to a Terfenol-D sample. Displacement, electrical current sent to a magnet generating the requested magnetic field, and temperature at different locations are measured. Using experimental data, the Preisach, homogenized energy, and Jiles—Atherton models are evaluated. For each model, the parameters are identified for Terfenol-D. The ease of use and accuracy of these models in the prediction of Terfenol-D behavior are compared.
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