Piezoelectric multilayer-stacked hybrid actuation/transduction system

US8680749B2 · kind B2 · utility

Assignees

• National Institute of Aerospace Associates · US
• THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATION OF NASA. · US

Inventors

• Tian-Bing Xu · Chesapeake, US
• Xiaoning Jiang · Raleigh, US
• Ji Su · Highland Park, US

Key dates

• Filing date: Sep 3, 2009
• Grant date: Mar 25, 2014
• Expiry date: Feb 15, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/50

Abstract

A novel full piezoelectric multilayer stacked hybrid actuation/transduction system. The system demonstrates significantly-enhanced electromechanical performance by utilizing the cooperative contributions of the electromechanical responses of multilayer stacked negative and positive strain components. Both experimental and theoretical studies indicate that for this system, the displacement is over three times that of a same-sized conventional flextensional actuator/transducer. The system consists of at least 2 layers which include electromechanically active components. The layers are arranged such that when electric power is applied, one layer contracts in a transverse direction while the second layer expands in a transverse direction which is perpendicular to the transverse direction of the first layer. An alternate embodiment includes a third layer. In this embodiment, the outer two layers contract in parallel transverse directions while the middle layer expands in a transverse direction which is perpendicular to the transverse direction of the outer layers.