Modeling the Effect of Aircraft Rotor Blades on Airborne Direction Finding (DF) Systems

Award Information
Agency: Department of Defense
Branch: Army
Contract: W15P7T-06-C-L002
Agency Tracking Number: A052-083-1595
Amount: $69,943.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2005
Solicitation Topic Code: A05-083
Solicitation Number: 2005.2
Small Business Information
APPLIED EM, INC.
24 Research Drive, Hampton, VA, 23666
DUNS: 782587406
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 C. Reddy
 President
 (757) 224-2035
 cjreddy@appliedem.com
Business Contact
 C. Reddy
Title: President
Phone: (757) 224-2035
Email: cjreddy@appliedem.com
Research Institution
N/A
Abstract
Direction Finding (DF) systems on rotorcrafts vehicles and more specifically rotorcraft UAVs suffer from effects on rotorcraft blade modulations. Only coarse DF on rotorcraft has been achieved during the EH-60 QuickFix program. During this effort, Applied EM is proposing to develop very accurate modeling tools to predict performance of DF systems on rotorcrafts. DF arrays are normally designed without accounting for platform effects. When mounted on a UAV, the operation of the direction-finding array is greatly affected by interactions of the antenna elements with the UAV structure. For a fixed wing UAV, these effects are mitigated by calibrating the DF array with the UAV structure. But for a rotorcraft UAV they cannot be implemented due to the inherent dynamic conditions associated with the rotating blades. Our major contribution to the current technology will be the development of cohesive modeling tools to simulate the effect of rotating blades on DF system, and to recommend mitigation techniques that concurrently address low size, weight and power (SWaP) requirements.

* information listed above is at the time of submission.

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