NASA SBIR 2008 Solicitation


PROPOSAL NUMBER: 08-1 A2.04-9607
SUBTOPIC TITLE: Aeroelasticity
PROPOSAL TITLE: Physics-Based Identification, Modeling and Risk Management for Aeroelastic Flutter and Limit-Cycle Oscillations (LCO)

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Advanced Dynamics, Inc.
1500 Bull Lea Road, Suite 203
Lexington, KY 40511 - 1268
(859) 699-0441

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Patrick Hu
1500 Bull Lea Road, Suite 203
Lexington, KY 40511 - 1268
(859) 699-0441

Expected Technology Readiness Level (TRL) upon completion of contract: 5 to 6

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
The proposed research program will develop a physics-based identification, modeling and risk management infrastructure for aeroelastic transonic flutter and limit-cycle oscillations (LCO). This capability will be built upon high fidelity state-of-the-art theoretical/computational methods as validated and verified by available experimental data bases, and will include (1) rapid flutter boundary determination for a wide range of configurations; (2) an assessment of the relative importance of various aerodynamic and structural nonlinearities for aircraft and aerospace configurations that are determined to be flutter critical and hence potentially capable of LCO; (3) an assessment of expected LCO amplitudes based upon high fidelity computational models; (4) an assessment of the potential for active and/or passive alleviation of LCO; and (5) a proposed risk management methodology that incorporates a prediction of tolerable LCO amplitudes and the capability for reducing unacceptable LCO response. Key challenges and milestones to by met include (1) a demonstration of the use of Navier-Stokes based CFD models and nonlinear structural models, including the use of system identification methods as appropriate and needed to predict flutter and LCO; (2) a demonstration of accurate modeling of aerodynamic and structural nonlinearities such as large shock wave motion, separated flow, structural freeplay and large geometric structural deflections and their impact on flutter and LCO; (3) characterization and evaluation of nonlinear dampers and nonlinear stiffness devices for alleviating LCO; (4) characterization and evaluation of active control systems for alleviating LCO; and (5) design and demonstration in wind tunnel test and flight test of an LCO alleviation device.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Installation of a prototype device in air vehicles to suppress transonic flutter and LCO and extend the flight envelope is highly demanded for safely operating civil as well as military aircrafts. The direct application of the SBIR effort to the current needs of NASA represents a prime opportunity for further product development and enhancement and represents a considerable potential revenue stream in engineering support, plus further technology acquisition.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Improvement of physics-based identification, modeling and risk management of (transonic) flutter and limit-cycle oscillations of an aeroelastic system is a common interest for wide range of engineering applications and, thus is highly demanded. It will be demonstrated that the proposed methodologies have great potential for enhancing the physics-based identification, modeling and risk management of flutter and limit-cycle oscillations of an aeroelastic system. DoD components likely to have interests in the technology developed in this SBIR project are the US Air Force, Navy and Army. The US industrial companies, including various aerospace & ocean as well as general engineering companies such as Boeing, Pratt & Whitney, General Electric, General Dynamics, Lockheed Martin andTextron, will be the major non-military potential customers. In addition, the corresponding industrial companies in Europe and Asia represent a very large marketing share of the resulting methods and technologies.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Computational Materials
Simulation Modeling Environment
Software Development Environments
Structural Modeling and Tools

Form Generated on 11-24-08 11:56