NASA 1999 SBIR Phase I


PROPOSAL NUMBER 99-1 05.03-5040 (Chron: 992163 )

PROJECT TITLE

Real-Time, In-Flight Determination of Unsteady Aerodynamic Loads & Moments


TECHNICAL ABSTRACT (LIMIT 200 WORDS)

A revolutionary approach is proposed to obtain in real time, aerodynamic loads and moments in terms of the instantaneous locations of principal aerodynamic flow phenomena such as the stagnation, flow separation, reattachment, boundary-layer transition, etc. The stability, control, safety, ride quality, and performance of flight vehicles depends upon the instantaneous values of aerodynamic loads and moments, as well as on their derivatives. In recent years successful attempts have been made to introduce flow separation or vortex breakdown point as an inner variable in the state-space representation to mathematically model unsteady aerodynamic loads and moments. Tao Systems has developed techniques to obtain these aerodynamic flow phenomena in real time using hot-film sensors, constant voltage anemometer system, and associated flow diagnostics software. However, there are no techniques currently available to directly obtain aerodynamic loads and moments in terms of these inner variables. The proposed innovation will provide direct input in terms of aerodynamic flow features for the determination of loads and moments, as well as the dynamic stability and control derivatives for flight vehicles under real time flight conditions.


POTENTIAL COMMERCIAL APPLICATIONS

The proposed innovation will result in huge cost savings in terms of reduced amounts of wind tunnel testing and increased productivity to establish aerodynamic characteristics of aerospace configurations. The product will be useful for the development of compact and efficient active control systems for improved ride quality, safety, stability, and control of transport and military flight vehicles.


NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR (Name, Organization Name, Mail Address,

City/State/Zip)

Siva M. Mangalam

Tao of Systems Integration, Inc.

471 McLaws Circle

Williamsburg , VA 23185 - 6317


NAME AND ADDRESS OF OFFEROR (Firm Name, Mail Address, City/State/Zip)

Tao of Systems Integration, Inc.

471 McLaws Circle, Suite 1

Williamsburg , VA 23185 - 6317