Volume 39 Issue 9
Sep.  2013
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Li Lin, Chen Liangliang, Yang Yonget al. Structural analysis of giant magnetostrictive actuator[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(9): 1269-1274. (in Chinese)
Citation: Li Lin, Chen Liangliang, Yang Yonget al. Structural analysis of giant magnetostrictive actuator[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(9): 1269-1274. (in Chinese)

Structural analysis of giant magnetostrictive actuator

  • Received Date: 08 Nov 2012
  • Publish Date: 30 Sep 2013
  • The structure form of giant magnetostrictive actuator(GMA) was studied in both mechanics and magnetics to obtain the properties of GMA. The patterns of permanent magnet (to induce the bias-magnetic-field), materials of the actuator-s covering and their impact on stroke and stiffness of the GMA were studied. The results show that the ring-type magnet leads to magnetic flux leakage, while the segment-type magnet with the steel covering can eliminate this phenomenon. Meanwhile the difference between the ideal and the actual bias magnetic field around the mandrel would greatly reduce the GMA-s stroke and has an assignable effect on the GMA-s stiffness. Both the stroke and the stiffness of the GMA must be considered in design. A novel design concept of the coupling magnetism and stiffness based on the properties of magnetostrictive material was proposed. The concept can provide a reference for structural design of GMA.

     

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