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Shock and Vibration
Volume 2017, Article ID 7679390, 9 pages
Research Article

Mechanical Impedance Matching Using a Magnetic Linear Gear

1MAG SOAR SL, 28341 Valdemoro, Spain
2Teoría de la Señal y Comunicaciones, Escuela Politécnica, Universidad de Alcalá, Campus Universitario, Ctra. Madrid-Barcelona, Km 33,6, Madrid, Spain

Correspondence should be addressed to Ignacio Valiente-Blanco; moc.raosgam@etneilavi

Received 27 March 2017; Revised 13 June 2017; Accepted 2 July 2017; Published 21 August 2017

Academic Editor: Onome E. Scott-Emuakpor

Copyright © 2017 Ignacio Valiente-Blanco et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


As part of the Fp7 Clean Sky Project, a linear magnetic gear prototype, called -transmitter, for aerospace application was designed, built, and tested. It demonstrates a maximum force capacity of 4700 N at 25°C and 4500 N at 90°C. Force ratio between slow and fast stages remains constant and equal to the design value: 7.0. The behavior of the real -transmitter as a mechanical impedance matching device when any stiffness is attached to the fast stage including the limit cases of a blocked fast stage or a free to move fast stage is experimentally explored. Although the real -transmitter deviates from the ideal, frictionless and massless, device, it still provides an impedance matching effect large enough to potentially become an extremely useful technology for vibration control when combined with other elements such as dampers, springs, or active elements.