Innovative Techniques of Modeling and Simulation for Commercial Derivative Aircraft Upset Recovery Navy SBIR FY2008.1 Sol No.: Navy SBIR FY2008.1 Topic No.: N08-005 Topic Title: Innovative Techniques of Modeling and Simulation for Commercial Derivative Aircraft Upset Recovery Proposal No.: N081-005-1003 Firm: Coherent Technical Services, Inc. 46591 Expedition Drive Suite 300 Lexington Park, Maryland 20653 Contact: Ian Gallimore Phone: (301) 880-3341 Web Site: www.goctsi.com Abstract: The National Transportation Safety Board's accident database reveals that up to 40% of all commercial aviation fatalities are due to loss of control. The military is acquiring commercial-derivative aircraft for certain missions, and will fly these aircraft more aggressively, increasing the potential for loss-of-control accidents. The main options available for obtaining aerodynamic derivatives outside the normal flight envelope include Computational Fluid Dynamics (CFD), wind tunnel testing, and flight testing. CTSi has proposed an innovative methodology to develop the needed aerodynamic database extensions by flight testing a scaled model UAV. This model replicates the dynamic response of the full-scale aircraft. New state-of-the-art methods in System Identification are used to extract the aerodynamic derivatives in upset conditions. The certified aerodynamic database is then appended using a new state-of-the-art automated procedure that guarantees a statistically-optimal blending of the multiple sources of aerodynamic data. Our method is self-contained and can be used by itself; and is also complementary to and compatible with aerodynamic data derived from CFD or wind tunnel tests. Benefits: As a direct result of this SBIR, CTSi will have developed, demonstrated and proven the feasibility and benefit of using a Scaled Model Unmanned Air System (UAS) as an efficient and effective methodology for simulating an aircraft response for a vehicle in an unusual attitude or outside the usual flight envelope. Demonstrating this capability for the P-8A program will clearly show the benefit to other similar DoD and commercial programs. This SBIR will plainly show that using a Scaled Model vehicle will provide significant risk reduction for the aerodynamic evaluation of either a new aircraft, for militarizing a commercial platform, or for simply making changes to an existing platform. After this concept is proven in Phase II of this SBIR the cost of developing a Scaled UAS for other platforms such as JSF, UCAS, F-22, B-787 will be orders of magnitude less than the cost and risk of flying the actual platform in Unusual Attitudes. Our approach, in addition to risk-reduction and flight test resource savings, will allow the user to develop automatic upset recovery control laws to assist the pilot or autonomously recover the vehicle. Return