Abstract
The leading-edge stagnation point (LESP) location was used to measure and control unsteady aerodynamic forces generated by a exible wing in response to gust and control actuation. The LESP location measured with sub-millisecond response at a number of span stations on the AFRL SensorCraft model installed in NASA’s Transonic Dynamics Tunnel (TDT) is shown to highly correlate, albeit with a phase dierence, with the structural response obtained with conventional strain gages and accelerometers. The results indicate that the LESP could be used as an aerodynamic observable for closed-loop ight control applications. Preliminary results from utter experiments conducted in the TDT tunnel will be shown. The role of unsteady aerodynamic observables for ight control and aerodynamic eciency will be discussed.
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