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Dynamical Model Research on Energy-Conversion Process of Giant Magnetstrictive Materials-Based Electrohydrostatic Actuator

[+] Author Affiliations
Yuchuan Zhu

Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, ChinaUniversity of Maryland, College Park, MD

Xulei Yang

Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China

Paper No. FPMC2015-9559, pp. V001T01A030; 6 pages
  • ASME/BATH 2015 Symposium on Fluid Power and Motion Control
  • ASME/BATH 2015 Symposium on Fluid Power and Motion Control
  • Chicago, Illinois, USA, October 12–14, 2015
  • Conference Sponsors: Fluid Power Systems and Technology Division
  • ISBN: 978-0-7918-5723-6
  • Copyright © 2015 by ASME


A giant Magnetstrictive materials-based Electro-hydrostatic Actuator (MEHA) is shown by presenting its structure configuration and working principle, which include a Giant Material Actuator (GMA), pump, two one-way check valves, a cylinder and utilize fluid rectification via one-way check valves to amplify the small, high-frequency vibrations of GMA into large motions of a hydraulic cylinder.

The established dynamic model of a MEHA involves five submodels from the viewpoint of energy conversion: the dynamic model of the power amplifier; the dynamic magnetization model that describes the relationship between the exciting current and the magnetization of the Giant Magnetostrictive Material (GMM) rod; the magnetoelastic model describing the relationship between the magnetostrictive strain and the magnetization of GMM rod; the kinetic model of the GMA describing the relationship between the GMA displacement (piston displacement of pump) and the magnetostrictive strain; the cylinder motion model.

By the simulation to the above model, dynamic characteristics of MEHA are clearly exhibited by the dynamic response curves, which show a good agreement with the experimental data and gives a scientific explanation about the test results.

Copyright © 2015 by ASME



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