Based on the nonlinear constructive model for magnetostrictive materials proposed by [1], a dynamic model is established to depict the natural characteristics of electro-magneto-mechanical coupling for magnetostrictive actuators. In this model, the change of Young's modulus of magnetostrictive materials with the magnetic field and the stress level in the operating actuators is considered. Due to this feature, the property of nonlinear parametric vibration with time-variant stiffness is presented in the dynamic characteristic of magnetostrictive actuators. By virtue of the numerical solution of the equation, the parametric frequency response characteristics of magnetostrictive actuators are obtained. Simultaneously, the effect of the amplitude of drive current and load mass on the dynamic characteristics of magnetostrictive actuators are investigated. The results are also compared with relative experimental investigations.

Date Published: 31 March 2009
PDF: 12 pages
Proc. SPIE 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009, 728928 (31 March 2009); doi: 10.1117/12.817883

Published in SPIE Proceedings Vol. 7289:
Behavior and Mechanics of Multifunctional Materials and Composites 2009
Zoubeida Ounaies; Jiangyu Li, Editor(s)