Modelling self-sensing of a magnetostrictive actuator based on a terfenol-D rod

doi:10.1088/1674-1056/23/12/127504

Abstract

A simplified quasi-static computational model for self-sensing applications of magnetostrictive actuators based on terfenol-D rods is presented. Paths and angle changes in the magnetic moments rotation of Tb_0.3Dy_0.7Fe₂ alloy are studied as functions of compressive stress and magnetic field, and then used to determine the magnetization in its actuation. Then sensing of magnetic induction picked from a driving coil in an actuator is derived. The model is quick and efficient to solve moments rotation and its magnetization. Sensing results of compressive stress and magnetostriction calculated by the model are in good agreement with experiments and will be helpful in the design and control of self-sensing applications in actuators.

Keywords: self-sensing model magnetostrictive actuator Tb_0.3Dy_0.7Fe₂ alloy moments rotation

Received: 04 June 2014
Revised: 16 July 2014
Accepted manuscript online:

PACS:	75.80.+q	(Magnetomechanical effects, magnetostriction)
	75.60.-d	(Domain effects, magnetization curves, and hysteresis)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)

Fund:

Project supported by the National Preeminent Youth Foundation (Grant No. 51225702) and the National Natural Science Foundation of China (Grant No. 51177024).

Corresponding Authors: Yan Bai-Ping
E-mail: denip@163.com

Cite this article:

Yan Bai-Ping (严柏平), Zhang Cheng-Ming (张成明), Li Li-Yi (李立毅), Tang Zhi-Feng (唐志峰), Lü Fu-Zai (吕福在), Yang Ke-Ji (杨克己) Modelling self-sensing of a magnetostrictive actuator based on a terfenol-D rod 2014 Chin. Phys. B 23 127504


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Modelling self-sensing of a magnetostrictive actuator based on a terfenol-D rod

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