Low-cost, low frequency slotted cylinder transducer

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-09-C-0238
Agency Tracking Number: N074-035-0174
Amount: $499,696.00
Phase: Phase II
Program: STTR
Awards Year: 2009
Solicitation Year: 2007
Solicitation Topic Code: N07-T035
Solicitation Number: N/A
Small Business Information
2500 N. Loop Drive, Ames, IA, 50010
DUNS: 798683355
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Eric Summers
 Director of Materials Eng
 (515) 296-8030
 eric.summers@etrema.com
Business Contact
 Jon Snodgrass
Title: Director of Materials Eng
Phone: (515) 296-8030
Email: jon.snodgrass@etrema.com
Research Institution
 ARL Penn State
 Charles Allen
 ARL Penn State
P.O. Box 30
State College, PA, 16804
 (814) 863-4430
 Nonprofit college or university
Abstract
In the Phase I effort a Galfenol-based slotted cylinder projector (SCP) device was conceived utilizing an existing PZT SCP design and analytical modeling to determine the geometry requirements necessary to achieve the performance specs: 210 dB source level, 750 Hz resonance frequency, 200 Hz bandwidth. The final form factor was a Galfenol SCP with overall dimensions of 7.75” diameter x 12” length utilizing a graphite composite shell material with Galfenol drivers comprising a rib-like structure within the shell. The technical objectives in Phase II will include design optimization through improved modeling efforts, the development of manufacturing processes capable of producing the Galfenol rib structures, and the construction and testing of one complete transducer system. Device test data will be compared to predicted performance results via the developed model. A design iteration will be completed on paper along with beginning investigations into reducing manufacturing costs.

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

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