Design optimization for metal-ceramic composite actuator, “moonie”

Onitsuka, Katsuhiko; Doğan, Aydın; Xu, Qian; Yoshikawa, Shoko; Newnham, R. E.

doi:10.1080/00150199408215924

Cited by 18 publications

(9 citation statements)

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“…The highest displacement was achieved when the groove was above the bonding layer. It is found that the deeper and wider the groove, the higher the displacement [13]. Fig.…”

Section: A Effect Of Endcup Design On Displacementmentioning

confidence: 91%

Composite piezoelectric transducer with truncated conical endcaps "cymbal"

Doğan

Uchino

Newnham

1997

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

222

102

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This paper presents original results obtained in the development of the moonie-type transducers for actuator applications. The moonie-type actuators fill the gap between multilayer and bimorph actuat.ors, but its positiondependent displacement and low generative force are unacceptable for certain applications. The moonie transducers were modified systematically by using finite element analysis combined with experimental techniques. A new transducer design, named "cymbal transducer", was developed with larger displacement, larger generative forces, and more cost-effective manufacturing. The cymbal transducers consist of a cylindrical ceramic element sandwiched between two truncated conical metal endcaps and can be used as both sensors and actuators. The cymbal actuator exhibits almost 40 times higher displacement than the same size of ceramic element. Effective piezoelectric charge coefficient, Eff. d33, of cymbal is roughly 40 times higher than PZT itself.

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“…The highest displacement was achieved when the groove was above the bonding layer. It is found that the deeper and wider the groove, the higher the displacement [13]. Fig.…”

Section: A Effect Of Endcup Design On Displacementmentioning

confidence: 91%

Composite piezoelectric transducer with truncated conical endcaps "cymbal"

Doğan

Uchino

Newnham

1997

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

222

102

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“…As the width of the rectangular unimorph increases from 0.254 to 1.01 cm, the displacement of the unimorph increases in close agreement with the calculated curve (dashed line), using Eq. (11).…”

Section: Resultsmentioning

confidence: 99%

“…4,11 Because the flextensional mode resonance vibration can be easily excited under alternating electric fields, these structures can be used as components for sensing applications over a broad range of frequency. The resonance frequency is related to the geometric shape as well as the elastic and piezoelectric properties of the materials.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical Behavior of PZT‐Brass Unimorphs

Aksay

Shih

1999

Journal of the American Ceramic Society

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We have examined the static and dynamic electromechanical responses of PZT-brass (piezoelectric-nonpiezoelectric) plate unimorphs of various brass/PZT thickness ratios. The study was performed both experimentally and theoretically. The static measurements showed that, given a PZT layer thickness, there exists a brass/PZT thickness ratio that gives the unimorph the highest static displacement under an applied field. The effects of geometric shape and external loading on the displacement of the unimorphs were also examined. The dynamic measurements showed that, given a PZT layer thickness, the bending-mode resonance frequencies increase with an increasing brass/PZT thickness ratio. These results were in good agreement with the theoretical predictions that were obtained with the plate geometry.

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“…6 To determine the effect of the groove, both the locations and the dimensions (depth and width) of the groove were altered. The most effective position of the groove is centred, just above the edge of the inner cavity, with 0.05 mm of depth and 0.2 mm of width.…”

Section: Mechanical Stress Distributionmentioning

confidence: 99%