Use of piezoelectric actuators as elements of intelligent structures

Crawley, Edward F.; Luis, Javier

doi:10.2514/3.9792

Cited by 2,306 publications

(1,259 citation statements)

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“…piezoceramic actuators bonded to beam structures. The first model, initially presented by Crawley and de Luis [2], assumed uniform axial strain in a pair of piezoceramic actuators bonded symmetrically to the outer surface of a beam undergoing actuator-induced bending. The second model assumed that the beam behaves as an Euler-Bernoulli beam, with linear distribution of axial strain throughout the composite actuator beam cross-section as shown in figure 2.…”

Section: Analytical Modelmentioning

confidence: 99%

Shape control of a beam using piezoelectric actuators

Agrawal

Treanor

1999

Smart Mater. Struct.

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Abstract. This paper presents the analytical and experimental results on optimal placement of piezoceramic actuators for shape control of beam structures. The objective is to determine the optimum piezoceramic actuator locations and voltages to minimize the error between the desired shape and the achieved shape. The analytical model for predicting beam deformation due to a piezoelectric actuator is based on the Euler-Bernoulli model. The cost function has fifth-order polynomials in the actuator locations and second-order polynomials in actuator voltages. This difference resulted in difficulty in simultaneous optimization of actuator locations and voltages. Using embedded Nader and Mead simplex algorithms to separately optimize actuator locations and voltages was found to produce reliable results, converging to the same optimum solution for a variety of initial conditions. Experimental results show that the analytical model provides a reasonable prediction of actuator performance at low input voltage, but does not account for the nonlinear behavior of the piezoceramic and effects of hysteresis.

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Section: Analytical Modelmentioning

confidence: 99%

Shape control of a beam using piezoelectric actuators

Agrawal

Treanor

1999

Smart Mater. Struct.

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“…Piezoelectric smart structures have a unique capability to control their behaviour, by virtue of electromechanical coupling present in them (Crawley and de Luis, 1987). Piezoelectric material present in the smart structure can be used either as sensor to get the quantitative information about the subjected environment or as an actuator to implement corrective action (Chee et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…The very early analytical model given by Crawley and de Luis (1987) was based on uniform strain and Euler-Bernoulli beam theory, to study the effectiveness of piezoelectric material in controlling static and dynamic behaviour of beams. Closed form solutions for axial strain, curvature and natural frequencies based on Euler-Bernoulli beam theory have been provided by Abramovich and Pletner (1997).…”

Section: Introductionmentioning

confidence: 99%

An accurate novel coupled field Timoshenko piezoelectric beam finite element with induced potential effects

Sulbhewar

Raveendranath

2014

Lat. Am. j. solids struct.

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An accurate coupled field piezoelectric beam finite element formulation is presented. The formulation is based on First-order Shear Deformation Theory (FSDT) with layerwise electric potential. An appropriate through-thickness electric potential distribution is derived using electrostatic equilibrium equations, unlike conventional FSDT based formulations which use assumed independent layerwise linear potential distribution. The derived quadratic potential consists of a coupled term which takes care of induced potential and the associated change in stiffness, without bringing in any additional electrical degrees of freedom. It is shown that the effects of induced potential are significant when piezoelectric material dominates the structure configuration. The accurate results as predicted by a refined 2D simulation are achieved with only single layer modeling of piezolayer by present formulation. It is shown that the conventional formulations require sublayers in modeling, to reproduce the results of similar accuracy. Sublayers add additional degrees of freedom in the conventional formulations and hence increase computational cost. The accuracy of the present formulation has been verified by comparing results obtained from numerical simulation of test problems with those obtained by conventional formulations with sublayers and ANSYS 2D simulations.

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“…Because of their subsurface inspection capability, fast inspection speed, simplicity and cost-effectiveness [3][4][5][6][7][8][9], there has been considerable interest in the use of piezoelectric materials. Some of these can be integrated with metals or polymer composites for structural health monitoring (SHM) purposes [3,4,10,11] subjected to high-temperature environments [3-5, 12, 13]. Common limitations of the current UTs are (1) the requirement of a couplant; (2) the lack of suitability for use on curved surfaces; (3) the difficulty for use in pulse-echo mode; and (4) the difficulty for use at temperatures higher than 60 • C.…”

Section: Introductionmentioning

confidence: 99%