Magnetostrictive mini actuators for smart structure applications

Abstract

This paper investigates the feasibility of using embedded magnetostrictive mini actuators (MMA) for smart structure applications, such as vibration suppression of beams. A cantilever beam, embedded with MMA and subjected to free vibration was chosen for this work. Based on the Euler-Bernoulli beam theory and the magneto-thermoelastic theory of MMA, an integrated mathematical model of the beam embedded with MMA is developed. The attenuation in attainable strain of the actuator due to embedding is investigated for two cases: pure bending and combined extension-bending actuation. Simulation, using an open-loop control-scheme, shows that it is possible to attenuate the vibration by embedding MMA in the beam.