Modeling and Closed-Loop Control of Complex Flows Over Aerodynamic Surfaces

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F49620-01-C-0048
Agency Tracking Number: F013-0010
Amount: $100,000.00
Phase: Phase I
Program: STTR
Awards Year: 2001
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
500 West Cummings Park, Suite 3000, Woburn, MA, 01801
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Pablo Arambel
 Research Engineer
 (781) 933-5355
Business Contact
 Raman Mehra
Title: President
Phone: (781) 933-5355
Research Institution
 Carol J Cantrell
 332 Wisenbaker, Engineering Research Center
College Station, PA, 77843
 (979) 862-1696
 Nonprofit college or university
The use of active flow control can reduce or eliminate the number of aerodynamic control surfaces in aircraft. Elimination of control surfaces results in a reduction of weight and drag, as well as radar observability. Recent advances in MicroElectromechanical Systems (MEMS) technology have rendered it a feasible alternative for unsteady flow sensing and control. This project will be performed jointly by Scientific Systems Co. and Prof. Rediniotis from Texas A&M University, and will demonstratethe use of MEMS for closed-loop flow control. In particular, a delta wing is controlled by actively inducing or delaying Vortex Breakdown (VBD) so as to globally affect the flow over the wing in a desired way. The feedback mechanism is hingeless andconsists of MEMS-based flow sensors and small Pneumatic Vortex Control (PVC) jet actuators. During this effort, we will develop modeling and control design algorithms for active flow control. Proposed Phase I tasks include: (a) acquisition of unsteady flowdata, (b) control-oriented reduced order unsteady flow modeling using wavelets, indicial functions, and system identification techniques, (c) feedback controller design and numerical evaluation using robust control techniques, and (d) planning forreal-time flow control demonstration in Phase II. Unsteady flow data will be acquired from the facilities in the fluid dynamics laboratory at Texas A&M University.Active control of vortical flow fields has applications in jet engines and turbomachinery,rotorcraft, air traffic control, and UAV formation flying. MEMS-based sensing and actuation technology has applications in NDE of structures, and bio-mimetics.

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

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