Abstract: The relationship between the input stress and the output flux density of the giant magnetostrictive devices exhibits hysteretic nonlinearity. A hysteretic model of a giant magnetostrictive device for magnetic force control is established based on the Jiles-Atherton model, the law of approach for the magnetomechanical effect and the magnetic circuit law. Experimental results show that the proposed model can better describe the hysteretic relationship among the input stress, the output flux density and magnetic force for the device under varying stress and constant bias magnetic field. The model can also predict the effect of the bias magnetic field on the output performance of the device. Therefore, the proposed model has important guiding significance for design and analysis of the devices.

Key words: Giant magnetostrictive device, Hysteresis, Inverse magnetostrictive effect, Jiles-Atherton model, Law of approach