Single Crystal Piezoelectric Actuators for Adaptive Structures

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W31P4Q-04-C-R108
Agency Tracking Number: 03SB2-0134
Amount: $98,972.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2003
Solicitation Topic Code: SB032-033
Solicitation Number: 2003.2
Small Business Information
2820 East College Avenue, State College, PA, 16801
DUNS: 782683007
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Paul Rehrig
 Director of Research & De
 (814) 238-7485
Business Contact
 Wesley Hackenberger
Title: President
Phone: (814) 238-7485
Research Institution
Single crystal piezoelectric actuators are proposed as a means of significantly increasing the stroke of a smart actuator to control the trailing edge flap of a helicopter rotor for vibration control and noise suppression. Conventional piezoelectric ceramic actuators have exhibited inadequate levels of stroke and/or force required to produce an angle of rotation of ±8° at 40 Hz. Single crystals based on (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) represent a revolutionary advance in piezoelectric actuator technology. These materials exhibit 5 to 10 times the strain of conventional ceramic piezoelectrics with equivalent deliverable force. Therefore, they offer a much broader design space for adaptive systems than is currently available with ceramic actuators, active fiber composites, electric motors or magnetic devices. The objectives of this project are: 1) to fabricate complete actuators of three leading actuator types using new single crystal piezoceramic material technology. Specifically, a d33 stack, and d32 bender, and a d15 induced shear tube will be addressed, 2) to measure and characterize piezo-coupling coefficients under electromechanical conditions representative of smart rotor and airframe applications, 3) to conduct a performance analysis quantifying the projected gains in actuation capability given the measured single crystal element characteristics.

* Information listed above is at the time of submission. *

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