Multistable actuator based on magnetic shape memory alloy..

Jean-Yves Gauthier (1) , Arnaud Hubert (1) , Joël Abadie (1) , Christian Lexcellent (2) , Nicolas Chaillet (1)

1 LAB - Laboratoire d'automatique de Besançon
2 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

Magnetic Shape Memory Alloys (MSMs) are attractive smart materials because they exhibit, at the same time, a large strain (10 %) and a short time response (100 microns s). In this paper, we propose a novel MSM based actuator exploiting the characteristics of MSMs. This device is a push-pull actuator where two pieces of MSM act in an opposite way. The magnetic fields are created by two magnetic coils supplied by current pulses. The hysteretic behaviour of the MSM permits to keep a stable position when no current is applied and so limits heat losses in the coils. A model of this actuator is proposed and validated by experiments. A precise position feedback control of the actuator is then achieved using a displacement laser sensor.

Mots clés: push-pull; Magnetic Shape Memory Alloy; MSM; actuator; multistable; push-pull.

Domaines: Micro et nanotechnologies/Microélectronique

Jean-Yves Gauthier, Arnaud Hubert, Joël Abadie, Christian Lexcellent, Nicolas Chaillet. Multistable actuator based on magnetic shape memory alloy... Proceedings of the 10th International Conference on New Actuators, ACTUATOR'06., Jun 2006, Bremen, Germany. pp.787-790. ⟨hal-00263954⟩