Abstract
One of the most frequent application of magnetostrictive actuator technology is the active structural vibration control (AVC). Magnetostrictive actuators (MA) can deliver high-output forces and relatively high displacements (compared to other emerging actuator technologies) and can be driven at high frequencies: these characteristics make them suitable for a variety of vibration control applications. The use of this technology, however, requires an accurate knowledge of the dynamics of such actuators. The paper introduces a linear model of magnetostrictive actuators hold in a range of frequencies below 2 kHz useful in real time application as AVC. The hypotesis supporting the linearity of the systems are discussed and the theoretical model is presented. Finally the model is validated by testing two different models of magnetostrictive actuators and comparing experimental results with the theoretical ones.
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