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Prediction and Control of Unsteady Aeroelasticity for Future Aerospace Vehicles

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 990955
Amount: $594,896.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Timeline
Solicitation Year: N/A
Award Year: 2001
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
687 Highland Ave
Needham, MA 02494
United States
DUNS: N/A
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Gahl Berkooz
 President and CEO
 () -
 gb@beamtech.com
Business Contact
 Gahl Berkooz
Title: President and CEO
Phone: (781) 239-9777
Email: gb@beamtech.com
Research Institution
N/A
Abstract

We propose to develop a computationally efficient, potentially revolutionary method of modeling unsteady aeroelastic systems and controlling dynamic loads. Improving aerodynamic performance to meet the mission goals of next-generation civil/military aircraft and launch vehicles requires dramatically new methods of predicting and controlling nonlinear fluid-structure dynamics. The proposed innovation will provide a rational design tool for analysis and control of resonant fluid-structure interaction without compromising the effects of shocks, viscosity, separation, and shock-boundary layer interaction. Stability of a coupled fluid-structure system is accurately predicted in an eigenvalue formulation where eigenvalues correspond to coupled-system modal frequencies in the time domain and their growth rates. Limit cycle oscillations may then be computed and bifurcation diagrams constructed. The eigensystem formulation is tailored to accommodate state-of-the-art, frequency-based flow and structural controllers. The NASA Langley Aeroelasticity Branch and researchers such as Dr. Walter A. Silva maintain experimental aeroelasticity data from two programs-- Benchmark Active Controls Technology (BACT) and Actively Controlled Response of Buffet Alleviated Tails (ACROBAT)-- and these data will be used to validate the new computational method.

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

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