&lt;title&gt;Modeling, design, and control of embedded Terfenol-D actuator&lt;/title&gt;

Anjanappa, M.; Bi, J

doi:10.1117/12.152820

Cited by 11 publications

(11 citation statements)

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“…A geometry or return path configuration that produces a large induced field is also vulnerable to strong influence of magneto-mechanical coupling upon the total field. Some magneto-mechanical analyses either ignore induced fields [10] or ignore the effect of magneto-mechanical coupling upon the induced field [1,2]. Our study revealed the influence of the coupling constant d33 upon the induced field and as a result on the total field.…”

Section: Direction Of Externallymentioning

confidence: 77%

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<title>Nonlinear finite element scheme for modeling the magnetoelastic response of magnetostrictive smart structures</title>

Kannan

Dasgupta

1994

SPIE Proceedings

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A variational statement of the nonlinear boundary value problem of magneto-mechanical interactions in magnetostrictive materials is presented. Some of the complexities arising out of the nature of these interactions are pointed out. A finite element code developed on the basis of a linearized version of the above variational statement is used to model the behavior of an idealized magnetostrictive actuator. The strong influence of coupling constants on the induced magnetic field is demonstrated through our coupled finite element analysis. Errors that are possible in uncoupled analyses are illustrated and the need for fully coupled analyses of general two or three dimensional actuator configurations is brought out.

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Section: Direction Of Externallymentioning

confidence: 77%

“…The behavior (magneto-mechanical interactions) of an embeddable mini-actuator under development by Anjanappa and co-workers ( [10]) is modeled in idealized, two dimension! form using the code developed.…”

Section: Resultsmentioning

confidence: 99%

<title>Nonlinear finite element scheme for modeling the magnetoelastic response of magnetostrictive smart structures</title>

Kannan

Dasgupta

1994

SPIE Proceedings

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“…The experimental results have been presented by Hiller et al (1989) to indicate the vibration which appears significant low-frequency performance with a small static deflection that can be isolated via the magnetostrictive extensions due to Terfenol magnetostrictive material subjected to a properly controlled magnetic field. A study including the design, modeling, and control of an embedded compact Terfenol-D actuator inflexible structures, especially rotorcraft blades, has been displayed by Anjanappa and Bi (1993) to suppress the unwanted vibration in the flexible structures. Anjanappa and Bi (1994a) proposed a thermoelastic mathematical theoretical model to describe magnetostrictive mini-actuators with validated experimentally.…”

Section: Introductionmentioning

confidence: 99%

Active control of a sandwich plate with reinforced magnetostrictive faces and viscoelastic core, resting on elastic foundation

Zenkour

El-Shahrany

2021

Journal of Intelligent Material Systems and Structures

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The current study presents a vibration investigation of a laminated plate considering a viscoelastic core with embedded magnetostrictive layers. The simply-supported plate is supported via Pasternak’s substrate medium. Based on different plate theories and employing Hamilton’s principle, the system of governing differential equations is derived. The mechanical properties of the viscoelastic core are described depend on the time varies based on Kelvin–Voigt model. Actuating magnetostrictive layers are utilized to control the vibration damping process of the system with the assistance of feedback and constant gain distributed control. The analytical solution is obtained to investigate the influence of half wave numbers, thickness ratios, core thickness, aspect ratios, lamination schemes, elastic foundation parameters, damping coefficient, feedback coefficient magnitude, magnetostrictive layers location, on the vibrational behavior of laminated plate. Some observations about the vibration damping process of the present plate are displayed. The results refer to that the vibration suppression rate depends on the thickness of the plate, the feedback control value, the foundation constants, and the viscoelastic structural damping significantly. Moreover, the study can be providing benchmark tests to validate future contributions on the viscoelastic smart structural issues and developing the design of smart viscoelastic structures and control of their vibrations.

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“…It has been found that giant magnetostrictive materials can provide a strain significantly larger than one of the other smart materials such as piezoelectric ones. Such a distinct feature motivates many researchers to conduct investigations for applying magnetostrictive materials as an actuator in intelligent systems [9][10][11], including a few works of design and theoretical research in the active control of flexible beams/plates using magnetostrictive materials as actuator layers [12][13][14][15][16][17], where the constitutive relations for magnetostrictive materials are employed by linear constitutive relations such that the control system becomes linear. In fact, the inherent nonlinear characteristics between magnetic field and deformation were measured in experiments [18,19] on the materials.…”

Section: Introductionmentioning

confidence: 99%

“…After that, the variable Young's modulus or natural frequency, magneto-mechanical coupling coefficient of the magnetostrictive materials and characteristics of active vibration control of Terfenol-D rods are quantitatively investigated [21,22]. In such cases, those investigations [12][13][14][15][16][17] of active control for the vibration suppression of beam/plate structures on the basis of the linear constitutive relations, or the linear piezomagnetic model (see figure 2 for typical constitutive curves) will be possibly disabled when the applied conditions, e.g. pre-stress and bias magnetic field, are located in the nonlinear regions.…”

Section: Introductionmentioning

confidence: 99%

Vibration suppression of laminated composite beams using actuators of giant magnetostrictive materials

Zhou

Zhou²

2007

Smart Mater. Struct.

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This paper presents a simulation of vibration suppression of a laminated composite beam embedded with actuators of a giant magnetostrictive material subjected to control magnetic fields. It has been found that the strains generated in the material are not only significantly larger than ones created by many other smart materials but also exhibit some inherent nonlinearities. To utilize the full potential of these materials in active vibration control, these nonlinearities should be characterized in the control system as accurately as possible. In this simulation of nonlinear dynamic controls, the control law with negative velocity feedback and the analytical nonlinear constitutive model of the magnetostrictive layer are employed. The numerical results show that this proposed approach is efficient not only in a linear zone but also in nonlinear zones (dead zone and saturation zone) of magnetostrictive curves in vibration suppression. Compared with those from the control system based on the linear constitutive relations of the material, it is found that the simulation results based on the linear model are efficient only when the magnetostrictive relations are located in the linear zone. Once the system has some departure from the linear zone, however, the results from the linear model become unacceptable. Finally, the effect of material properties, lamination schemes and location of the magnetostrictive layers on vibration suppression of the practical system is evaluated.

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<title>Modeling, design, and control of embedded Terfenol-D actuator</title>

Cited by 11 publications

References 0 publications

<title>Nonlinear finite element scheme for modeling the magnetoelastic response of magnetostrictive smart structures</title>

<title>Nonlinear finite element scheme for modeling the magnetoelastic response of magnetostrictive smart structures</title>

Active control of a sandwich plate with reinforced magnetostrictive faces and viscoelastic core, resting on elastic foundation

Vibration suppression of laminated composite beams using actuators of giant magnetostrictive materials

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