NASA SBIR 2007 Solicitation


PROPOSAL NUMBER: 07-1 A2.04-8684
SUBTOPIC TITLE: Aeroelasticity
PROPOSAL TITLE: Aeroelastic Uncertainty Analysis Toolbox

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Systems Technology Inc
13766 South Hawthorne Blvd
Hawthorne, CA 90250 - 7083
(310) 679-2281

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
David H. Klyde Systems Technology, Inc.
13766 S. Hawthorne Blvd.
Hawthorne, CA 90250 - 7083
(310) 679-2281

Expected Technology Readiness Level (TRL) upon completion of contract: 2 to 3

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Flutter is a potentially explosive phenomenon that is the result of the simultaneous interaction of aerodynamic, structural, and inertial forces. The analytical prediction of flutter in the transonic regime requires high fidelity simulation models that are computationally expensive. Due to the computational demands, traditional uncertainty analysis is not often applied to flutter prediction, resulting in reduced confidence in the results. This Phase I research is aimed at exploring methods to reduce the previous computational time limitations of traditional uncertainty analysis. To dramatically reduce the computational burden of uncertainty analysis, Systems Technology, Inc. proposes to investigate both the coupling of Design of Experiment (DOE) and Response Surface Methods (RSM), and the application of robust stability techniques, namely ƒÝ-analysis. Using Reduced Order Models (ROM), the DOE/RSM and ƒÝ-analysis approaches will be compared to traditional Monte Carlo based stochastic simulation. The result of the Phase I program will be to demonstrate the utility of the core elements of the Aeroelastic Uncertainty Analysis Toolbox (AUAT). AUAT will contain multiple methods for addressing flutter uncertainty analysis, coupled with a state-of-the-art nonlinear aeroelastic code.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Enhanced predictive flutter boundaries using the Aeroelastic Uncertainty Analysis Toolbox will decrease the likelihood to test beyond the flutter boundary, thus decreasing the risk of unexpected flutter that may lead to catastrophic failure and thereby increasing flight safety. The software will be developed with the intent of being used for flight test planning. Rapid uncertainty analysis capability will be highly beneficial during aeroservoelastic flight tests to more accurately predict the flight envelope prior to testing.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Applying the uncertainty analysis early in the design process will enable manufacturers to design high performance aircraft with expanded flight envelopes that are robust to uncertainties pertaining to aeroelastic phenomena such as flutter. Rapid uncertainty analysis capability will enable designers to evaluate a larger design space in less time, decreasing the amount of incremental flight testing, thereby reducing the cost of development.

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.

Controls-Structures Interaction (CSI)
Expert Systems
Launch and Flight Vehicle
Portable Data Acquisition or Analysis Tools
Simulation Modeling Environment
Software Tools for Distributed Analysis and Simulation
Structural Modeling and Tools

Form Generated on 09-18-07 17:50