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Self-Sensing Actuators Based on Ferromagnetic Shape Memory Alloys

: Ehle, Fabian; Neumeister, Peter; Keitel, Uwe; Neubert, Holger

Actuator 2018, 16th International Conference on New Actuators : Bremen, Germany, 25-27 June 2018
Bremen: Messe Bremen, 2018
ISBN: 978-3-933339-30-0
ISBN: 3-933339-30-8
ISBN: 978-3-8007-4675-0 (VDE-Verlag)
International Conference on New Actuators <16, 2018, Bremen>
Fraunhofer IKTS ()
FSMA; MSM actuators; Self-sensing

Ferromagnetic shape memory alloys (FSMA) exhibit a strong magneto-mechanical coupling, which motivates their application in electro-mechanical actuators. The significant magnetic anisotropy causing the coupling can also be used for sensing. The application of both mechanism within one device form a so called self-sensing actuator. However, sensing in presence of an actuation magnetic field has not been investigated much in detail. The present study conveys the potential of different self-sensing concepts within FSMA actuators by means of simulation models, assuming typical properties and magnetic circuit topologies. Results are evaluated and the potential for practical assemblies of self-sensing FSMA actuators is discussed.