Dynamic model of giant magnetostrictive transducer under magnetic field and stress

A dynamic model of giant magnetostrictive transducer under magnetic fields and stress is presented, based on the Jiles-Atherton model, the magnetic principle and the transducer's structural dynamics principle. The model quantifies the magnetization changes that the magnetostrictive material undergoes when subjected to the variable magnetic field and stress, and it can be used for both magnetostrictive actuators and sensors. It is found that the calculating results are in a good agreement with the experimental ones under the actuator mode. In the sensor mode, the sensing voltage of the magnetostrictive sensor is analyzed when the bias magnetic field and the prestress are varied. The experimental results and the calculating ones are consistent, which indicates the model's validity and practicability.