Performance and modeling of magnetic shape memory actuators and sensors

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Suorsa, Ilkka
dc.date.accessioned 2012-02-17T06:55:47Z
dc.date.available 2012-02-17T06:55:47Z
dc.date.issued 2005-05-16
dc.identifier.isbn 951-22-7645-3
dc.identifier.issn 1795-4584
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2555
dc.description.abstract Magnetic Shape Memory (MSM) materials comprise a new active material type, which can change its shape in magnetic fields. Non-stoichiometric Ni-Mn-Ga in 5M martensite is the most utilized MSM material so far. It has been used also in this study. The material has also a reverse effect: the change in shape of the material with non-zero magnetization alters the magnetic field in which it is placed. Due to its properties, the material has two promising applications: motion-generating actuators and sensors. In this work, both sensors and actuators are studied with interest focused on the modeling and operation parameters of the applications. A lumped parameter model for contruction of an actuator and a sensor consisting of models for MSM effect and magnetic, mechanical and electric circuits of the application has been made. The models have been tested with measurements. In addition, the properties of the material itself have been studied. The magnetic field induced stress and the magnetization dependence on strain have been measured. The magnetic field induced stress in MSM material was found to be in accordance with existing theory. Under high magnetic fields, the measured magnetization dependence on strain was also predicted by the existing theory. However, a new functional dependence was found under low magnetic fields. New MSM applications have been built and tested as linear motors and speed sensors. The speed sensor can also be used as a voltage generator. Associated with the linear motor, a control system for MSM actuators was studied and built. en
dc.format.extent 70, [38]
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.ispartofseries TKK dissertations en
dc.relation.ispartofseries 4 en
dc.relation.haspart Suorsa I. and Pagounis E., 2004. Magnetic field-induced stress in the Ni-Mn-Ga magnetic shape memory alloy. Journal of Applied Physics, Vol. 95, No. 9, pp. 4958-4961. [article1.pdf] © 2004 American Institute of Physics. By permission.
dc.relation.haspart Suorsa I., Pagounis E. and Ullakko K., 2004. Magnetization dependence on strain in the Ni-Mn-Ga magnetic shape memory material. Applied Physics Letters, Vol. 84, No. 23, pp. 4658-4660. [article2.pdf] © 2004 American Institute of Physics. By permission.
dc.relation.haspart Suorsa I., Tellinen J., Ullakko K. and Pagounis E., 2004. Voltage generation induced by mechanical straining in magnetic shape memory materials. Journal of Applied Physics, Vol. 95, No. 12, pp. 8054-8058. [article3.pdf] © 2004 American Institute of Physics. By permission.
dc.relation.haspart Suorsa I., Pagounis E. and Ullakko K., 2004. Magnetic shape memory actuator performance. Journal of Magnetism and Magnetic Materials, Vol. 272-276, pp. 2029-2030. [article4.pdf] © 2004 Elsevier Science. By permission.
dc.relation.haspart Suorsa I., Tellinen J., Pagounis E., Aaltio I. and Ullakko K., 2002. Applications of magnetic shape memory actuators. Proceedings of the Actuator 2002 Conference. Bremen, Germany, 12-14 June 2002, pp. 158-161.
dc.relation.haspart Suorsa I., Tellinen J., Aaltio I., Pagounis E. and Ullakko K., 2004. Design of active element for MSM actuator. Proceedings of the Actuator 2004 Conference. Bremen, Germany, 14-16 June 2004, pp. 573-576.
dc.subject.other Electrical engineering en
dc.title Performance and modeling of magnetic shape memory actuators and sensors en
dc.type G5 Artikkeliväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Electrical and Communications Engineering en
dc.contributor.department Sähkö- ja tietoliikennetekniikan osasto fi
dc.subject.keyword magnetic shape memory material en
dc.subject.keyword Ni-Mn-Ga en
dc.subject.keyword sensors en
dc.subject.keyword actuators en
dc.subject.keyword magnetic modeling en
dc.identifier.urn urn:nbn:fi:tkk-005090
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en
dc.contributor.lab Laboratory of Electromechanics en
dc.contributor.lab Sähkömekaniikan laboratorio fi


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