Phenomenological dynamic model of a magnetostrictive actuator D. Davino a , C. Natale b , S. Pirozzi b , and C. Visone a,* a DING, Universit`a degli Studi del Sannio, piazza Roma, 82100 Benevento, Italy 1 b DII, Seconda Universit`a degli Studi di Napoli, via Roma 29, 81031 Aversa, Italy Abstract The paper proposes a two-stage model able to describe the dynamic behavior of a commercial magnetostrictive actuator in the frequency range of interest for fast ac- tuation purposes. The first stage is a static model of hysteresis, while the second one is a linear dynamic model. The model structure allows to define well-assessed identi- fication procedures for both stages. In particular, the identification of the dynamic stage is realized by the compensation of the transducer’s hysteresis, through the employment of a pseudo-compensator. Experimental validation of the model is also reported and further applications to other magnetostrictive actuators is addressed. Key words: hysteresis, compensator, dynamic models, magnetostrictive actuators * Corresponding author. Email address: visone@unisannio.it (C. Visone ). 1 Fax: +39-0824 30 58 40 Preprint submitted to Elsevier Science 18 July 2003