An Advanced Physics Based Model for Aircraft Upset Real Time Simulation Navy SBIR FY2008.1 Sol No.: Navy SBIR FY2008.1 Topic No.: N08-005 Topic Title: An Advanced Physics Based Model for Aircraft Upset Real Time Simulation Proposal No.: N081-005-1149 Firm: Continuum Dynamics, Inc. 34 Lexington Avenue Ewing, New Jersey 08618-2302 Contact: Jeffrey Keller Phone: (609) 538-0444 Web Site: www.continuum-dynamics.com Abstract: Flight operations of military aircraft, including those derived from commercial transports, are subject to highly dynamic conditions over broad operational envelopes, which may be further complicated by off-design configurations caused by ballistic damage. Flight simulation, including training applications, must model the aircraft flight dynamics with high fidelity over this operational envelope, requiring extensive aerodynamic databases in current simulation approaches. A physics-based approach for flight dynamics modeling in the high angle of attack and sideslip range is proposed based on a nonlinear lifting line/ surface methodology combined with an unsteady aircraft wake model. This modeling approach has its roots in the aerodynamic modeling of rotorcraft, where dynamic stall and yawed flow conditions are routinely found, and has been recently examined for fixed-wing aircraft in post-stall (upset) conditions. The proposed approach permits real-time simulation of unsteady aerodynamic and wake phenomena. In Phase I, the nonlinear lifting line/surface and unsteady wake model will be applied to high angle aerodynamics and flight dynamics of commercial-derivative military aircraft for demonstration of an advanced aircraft upset simulation, including modeling of ballistic damage effects. This work will form the basis for development of a prototype simulation capability with reduced aerodynamic data requirements for military and commercial applications. Benefits: Development of an advanced, physics-based modeling capability for aircraft aerodynamics and flight dynamics in upset conditions will support high fidelity simulation throughout and beyond the flight envelope. The proposed research and development program will provide an advanced modeling capability without requiring extensive wind tunnel or flight test data, providing cost benefits for simulation of commercial derivative aircraft or aircraft for which aerodynamic data are limited or not readily available, such as in cases of ballistic damage. Thus, the proposed research and development will benefit a broad range of Navy and DoD aircraft systems. Increasing interest in providing upset identification and recovery training to commercial and general aviation pilots will provide additional commercial opportunities, since the proposed approach may be retrofitted into existing flight simulators and training devices, and therefore, will extend existing aerodynamic databases using physics-based methods. Return