There has been great progress in the ability of high-resolution computational methods to compute absolute forces and moments of steady and maneuvering air vehicles in the full flight envelope. However, multidisciplinary effects are most often the cause of unexpected stability and control behavior, and therefore it is important that computational tools utilized in the GNC community incorporate the interrelated physics from nonlinear aerodynamics, aeroelasticity, thermochemistry, and propulsion effects, among others. The CREATE™-AV Kestrel product was built from the ground up to address these challenges and provide a high-fidelity, multidisciplinary simulation capability for fixed-wing aircraft analyses. Unfortunately, these unsteady simulations can still require multiple days on hundreds to thousands of cores on a parallel compute machine. These long simulation times make single point or single maneuvers relatively unusable to the flight control system designers who require a complete aero database for multiple configurations. The CREATE™-AV Kestrel development team, among others, have been developing a reduced-order modeling process that is based on the high-resolution simulations to create time accurate, compact, fast, aero-data for the GNC community to use in flight control system design and implementation. This paper will discuss the multidisciplinary simulation capabilities of Kestrel as it pertains to stability and control analyses and also document the reduced-order modeling process and show some examples of computing aircraft stability and control for relevant DoD aircraft.
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