Magnetostrictive Materials

Dapino, Marcelo J.

doi:10.1002/0471216275.esm051

Cited by 25 publications

(25 citation statements)

References 47 publications

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“…neglecting the thermal effects, are as follows [9]: The magnetoelastic coupling constants are problematic from the modelling point of view. In [10] a method presents how the constants can be measured.…”

Section: Magnetostriction and Inverse-magnetostrictionmentioning

confidence: 99%

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Coupled wave-equation and eddy-current model for modelling and measuring propagating stress-waves

Peussa¹,

Belahcen²

2015

Archives of Electrical Engineering

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Abstract:The coupling of the propagating stress wave with the eddy current model is presented. The applied stress produces magnetization in the sample that can be measured outside the sample by measuring the resulting magnetic flux density. The stress and flux density measurements are made on a mechanically excited steel bar. The problem is modelled with the finite element method for both the propagating wave and the eddy current. Three aspects are considered: eddy current model using magnetization from the measurements, coupled wave and eddy current models, and coupled different dimensions in the wave model. The measured stress can be reproduced from the measured flux density by modelling. The coupled models work both for stress and flux couplings as well as for the different dimensionality couplings.

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Section: Magnetostriction and Inverse-magnetostrictionmentioning

confidence: 99%

“…In this study, the stress, σ , and magnetization, M, are linearly related , σ α = s M (9) where α is a scaling factor. This is a simplification of linear constitutive model, that is restricted to small signal excitation levels [35].…”

Section: Wave-equation and Eddy-current Modelmentioning

confidence: 99%

Coupled wave-equation and eddy-current model for modelling and measuring propagating stress-waves

Peussa¹,

Belahcen²

2015

Archives of Electrical Engineering

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“…This provides advantages in numerous applications such as high resolution acoustic imaging [1], morphing aircraft control surfaces [2], and high resolution nanopositioning stages [3,4]. High force magnetostrictive materials such as Terfenol-D provide broadband capability (DC up to 20 kHz) with forces up to 550 N [5,6], which are utilized in many industrial settings such as high-speed precision machining [7]. A good review of numerous magnetostrictive device applications is given in [8].…”

Section: Sponsoring/monitoring Agency Name(s) and Address(es) 10 Spomentioning

confidence: 99%

Optimal Tracking Using Magnetostrictive Actuators Operating in Nonlinear and Hysteretic Regimes

Oates

Smith

2009

Journal of Dynamic Systems, Measurement, and Control

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Many active materials exhibit nonlinearities and hysteresis when driven at field levels necessary to meet stringent performance criteria in high performance applications. This often requires nonlinear control designs to effectively compensate for the nonlinear, hysteretic field-coupled material behavior. In this paper, an optimal control design is developed to accurately track a reference signal using magnetostrictive transducers. The methodology can be directly extended to transducers employing piezoelectric materials or shape memory alloys (SMAs) due to the unified nature of the constitutive model employed in the control design. The constitutive model is based on a framework that combines energy analysis at lattice length scales with stochastic homogenizations techniques to predict macroscopic material behavior. The constitutive model is incorporated into a finite element representation of the magnetostrictive transducer which provides the framework for developing the finite-dimensional nonlinear control design. The control design includes an open loop nonlinear component computed off-line with perturbation feedback around the optimal state trajectory. Estimation of unmeasurable states is achieved using a Kalman filter. The hybrid control technique provides the potential for real-time control implementation while providing robustness with regard to operating uncertainties and unmodeled dynamics.

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“…Ferromagnetic materials such as Terfenol-D are being investigated for use in high speed milling devices, sonar transducers, vibration attentuation devices and ultrasonic transducers [8,9,18]. Ferroelectric materials such as PZT are presently employed in essentially all nanoposition systems such as atomic force microscopes (AFM) due to their high set point accuracy [20].…”

Section: Introductionmentioning

confidence: 99%

Quantification of hysteresis and nonlinear effects on the frequency response of ferroelectric and ferromagnetic materials

Stuebner

Atulasimha

Smith

2009

Smart Mater. Struct.

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Abstract. Ferroelectric (e.g., PZT and PMN) and ferromaqnetic (e.g., Terfenol-D) materials exhibit high energy densities, broadband drive capabilities, and the capacity for both actuating and sensing. This makes them attractive as compact transducers for applications including nanopositioning systems such as atomic force microscopes (AFM), acoustic transducers, and drive mechanisms for high speed milling. However, these materials also exhibit hysteresis and constitutive nonlinearities at all drive levels. To achieve stringent tracking requirements, it is critical to understand and quantify the effect of hysteresis and nonlinearities on the frequency behavior of devices that employ these compounds. Whereas considerable progress has been made on model development and understanding these materials in the parameter space and time domain, comprehensive quantification of these effects in the frequency domain is presently lacking. In this paper, we investigate both numerically and experimentally the effect of hystersis, constitutive nonlinearities, bias fields and AC drive levels on the frequency domain behavior of ferroelectric and ferromagnetic materials.

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Magnetostrictive Materials

Cited by 25 publications

References 47 publications

Coupled wave-equation and eddy-current model for modelling and measuring propagating stress-waves

Coupled wave-equation and eddy-current model for modelling and measuring propagating stress-waves

Optimal Tracking Using Magnetostrictive Actuators Operating in Nonlinear and Hysteretic Regimes

Quantification of hysteresis and nonlinear effects on the frequency response of ferroelectric and ferromagnetic materials

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