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Date of Publication:2022-10-07

Journal:大连理工大学学报

Affiliation of Author(s):机械工程学院

Issue:3

Page Number:368-372

ISSN No.:1000-8608

Abstract:An accurate dynamics model is crucial to enhance the control accuracy and implement the submicron control for the giant magnetostrictive actuator. To describe the dynamics characteristics of the giant magnetostrictive actuator precisely, a dynamics model is presented. Regarding Terfenol-D rod as a viscoelastic rod continuous system and treating the induced strain by external magnetic field as equivalent force, a one-dimension wave equation for the actuator is built. The solution of the equation by finite element method is given with the iterative method. The model is easy to utilize for the real-time implementation. It provides the experimental data and numerical simulated data calculated with Matlab 7.0 by magnetic field versus displacement (H-u) curves under the different frequencies and the same magnetic field drive level. The simulated and experimental results with the error within 10% indicate the validity of the model.

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