Preprint Article Version 1 This version is not peer-reviewed

Flexural Deflection Prediction of Piezo-Composite Unimorph Actuator Using Material Orthotropy and Nonlinearity of Piezoelectric Material Layer

Version 1 : Received: 17 March 2020 / Approved: 18 March 2020 / Online: 18 March 2020 (02:58:14 CET)

A peer-reviewed article of this Preprint also exists.

Lee, J.H.; Yoon, B.S.; Park, J.-W.; Song, G.; Yoon, K.J. Flexural Deflection Prediction of Piezo-Composite Unimorph Actuator Using Material Orthotropy and Nonlinearity of Piezoelectric Material Layer. Coatings 2020, 10, 437. Lee, J.H.; Yoon, B.S.; Park, J.-W.; Song, G.; Yoon, K.J. Flexural Deflection Prediction of Piezo-Composite Unimorph Actuator Using Material Orthotropy and Nonlinearity of Piezoelectric Material Layer. Coatings 2020, 10, 437.

Journal reference: Coatings 2020, 10, 437
DOI: 10.3390/coatings10050437

Abstract

Research on piezo-composite actuators has been actively conducted over the past two decades as a response to strong demand for light, compact actuators to replace electro-magnetic motor actuators in micro robots, small flying drones, and compact missile systems. Layered piezo-composite unimorph actuators have been studied to provide active vibration control of thin-walled aerospace structures, control the shapes of aircraft wing airfoils, and control the fins of small missiles, because they require less space and provide better frequency responses than conventional electro-magnetic motor actuator systems. However, based on the limited actuation strains of conventional piezo-composite unimorph actuators with poly-crystalline piezoelectric ceramic layers, they have not been implemented effectively as actuators for small aerospace vehicles. In this study, a lightweight piezo-composite unimorph actuator (LIPCA-S2) was manufactured and analyzed to predict its flexural actuation displacement. It was found that the actuated tip displacement of a piezo-composite cantilever could be predicted accurately using the proposed prediction model based on the nonlinear properties of the piezoelectric strain coefficient and elastic modulus of a piezoelectric single crystal.

Subject Areas

piezoelectric ceramic; piezo-composite actuator; unimorph; piezoelectric single crystal; LIPCA

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