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Abstract
ERODYNAMIC model reduction based on internal balancing is examined for incompressible potential flow and is shown to allow signification reduction in model complexity. The technique wa sv alidated against classical two-dimensional incompressible unsteady results, as well as an aeroelastic flutter boundary calculation. In particular, new insight is given into the relationship between balanced aerodynamic states and the fundamental physics of airfoil and wing motion. The form of the principal retained states suggests that the physics of a few dominant limiting-case airfoil motions characterize the flow. Comparison with exact solutions for a twodimensional case are shown to illustrate this point. A popular technique for aerodynamic model reduction is to per
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