Pulse width modulated servo valve enabled by single crystal piezoelectric

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$98,456.00
Award Year:
2004
Program:
SBIR
Phase:
Phase I
Contract:
W31P4Q-04-C-R107
Award Id:
68721
Agency Tracking Number:
03SB2-0112
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
13027A Beaver Dam Road, Cockeysville, MD, 21030
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
959989054
Principal Investigator:
Keith Bridger
Technical Director
(202) 547-0293
fsbridger@aol.com
Business Contact:
Arthur Cooke
President
(410) 636-9350
arthur.activesignal@email.toast.net
Research Institution:
n/a
Abstract
Active Signal Technologies and Moog propose to demonstrate a solid state pulse width modulated pilot stage for a servo valve enabled by single crystal PMN-PT. The basic mechanism and labor intensive fabrication processes used to build conventional servo valves remain largely unchanged since the device was launched in 1951, resulting in high cost and limited bandwidth. A digitally controlled valve has been long sought but has not materialized because of the limitations of available drivers -- low frequency capability of magnetic torque motors and solenoids, and stroke limitations of "high strain" solid state materials such as Terfenol and PMN. However, the advent of single crystal PMN-PT with over 2 times the strain of conventional solid state materials and low hysteresis can supply the 10X bandwidth improvement needed to realize a truly digital valve. The new servo valve will not only be smaller and low cost, but will be more readily integrated with digital control, especially for adaptive structural control using distributed actuation. In Phase I we will build a working pilot stage valve and demonstrate its switching speed capability, and in Phase II we will develop a fully integrated high speed servo valve using this technology.

* information listed above is at the time of submission.

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