Modeling of magnetostriction in grain aligned terfenol-D and preferred orientation change of terfenol-D dendrites

Park, Won-Je; Son, Derac; Lee, Zin-Hyoung

doi:10.1016/s0304-8853(02)00290-1

Cited by 25 publications

(17 citation statements)

References 6 publications

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“…3 is the simulation curve of displacement step response when the digital input of the NC constantcurrent source is 4000. In the work process, GMA always generates magnetostriction when one end is clamped or fixed and only moves along the axial direction [21][22][23][24][25][26][27]. So the actuator dynamic model as shown in Fig.…”

Section: Working Principle Of Gmamentioning

confidence: 99%

Control Study of Precision Giant Magnetostrictive Actuator Based on Active Disturbance Rejection Control Technology

Wang¹,

Zheng²,

Zhang³

2012

JCP

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Introduce the structure and working principle of precision giant magnetostrictive actuator and establish the actuator system object transfer function model so as to design a suitable active disturbance rejection controller (ADRC). According to the model analysis, regard the actuator system as a first-order inertia object with dead time to construct second-order ADRC, use MATLAB for parameter tuning and put the parameters into the controller to conduct simulation experiment on the actuator system objects. Simulation results show that the ADRC constructed has good control effect and strong anti-jamming ability and the parameters have strong robustness.

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Section: Working Principle Of Gmamentioning

confidence: 99%

Control Study of Precision Giant Magnetostrictive Actuator Based on Active Disturbance Rejection Control Technology

Wang¹,

Zheng²,

Zhang³

2012

JCP

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“…The magnetostrictive coefficient d 33 is often called the magnetostrictive strain coefficient. For Terfenol D the value of the magnetostrictive coefficient d 33 is in the range 5-70 nm/A [1,20]. Both coefficients depend not only on the pre-stress as illustrated above, but also on the applied magnetic field.…”

Section: Fig 7 Strain Versus Magnetic Fieldmentioning

confidence: 99%

Design and application of magnetostrictive materials

Olabi¹,

Grunwald²

2008

Materials & Design

397

191

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Abstract:Magnetostriction is the change in shape of materials under the influence of an external magnetic field. The cause of magnetostriction change in length is the result of the rotation of small magnetic domains. This rotation and re-orientation causes internal strains in the material structure. The strains in the structure lead to the stretching (in the case of positive magnetostriction) of the material in the direction of the magnetic field. During this stretching process the cross-section is reduced in a way that the volume is kept nearly constant. The size of the volume change is so small that it can be neglected under normal operating conditions. Applying a stronger field leads to stronger and more definite re-orientation of more and more domains in the direction of magnetic field. When all the magnetic domains have become aligned with the magnetic field the saturation point has been achieved.

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“…[1][2]. To achieve excellent performance, Terfenol-D alloys should be a single crystal or a unidirectionally grain aligned polycrystal [3]. Therefore, Terfenol-D alloys are usually prepared by directional solidification process.…”

Section: Introductionmentioning

confidence: 99%

Bonded Terfenol-D composites with low eddy current loss and high magnetostriction

et al. 2010

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Bonded Terfenol-D composites, with high electrical resistivity and low eddy current loss, can be used in an alternating magnetic field with high frequency. However, the nonmagnetic binder impairs the magnetostriction of the composites. To achieve high magnetostriction and low eddy current loss, the mixture of the alloy powder and binder was compressed at low pressure in an oriented magnetic field. After this, the aligned samples were recompressed by cold isostatic pressing (CIP). Besides, the effect of particle size on the magnetostriction of the bonded Terfenol-D composites was also studied. The results showed that the bonded Terfenol-D composites had excellent magnetostriction when the particle size was 50-80 μm. The oriented magnetic field and CIP could improve the magnetostriction of the bonded composites, which reaches 1020×10 -6 . The bonded Terfenol-D composites had good compact structure and high density (7.24 g/cm 3 ). The magnetic loss of the bonded Terfenol-D composites was 192 mW/cm 3 at a frequency of 100 kHz in a magnetic field of 960 A/m, which was about one third of that of casting Terfenol-D alloys.

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Modeling of magnetostriction in grain aligned terfenol-D and preferred orientation change of terfenol-D dendrites

Cited by 25 publications

References 6 publications

Control Study of Precision Giant Magnetostrictive Actuator Based on Active Disturbance Rejection Control Technology

Control Study of Precision Giant Magnetostrictive Actuator Based on Active Disturbance Rejection Control Technology

Design and application of magnetostrictive materials

Bonded Terfenol-D composites with low eddy current loss and high magnetostriction

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