03.2 - Structural Analysis and Design, Structural Dynamics, Aeroelasticity
UNSTEADY AERODYNAMIC FORCE SENSING FROM MEASURED STRAIN
C.-G. Pak, NASA Armstrong Flight Research Center, United States
A simple approach for computing unsteady aerodynamic loads from the measured strain is proposed in this study. First, deflection and slope of the structure and frequencies of the aeroelastic system are computed from the time histories of strain. Accelerations and velocities of the structure can be obtained from deflections, slopes, and frequencies. Finally, aerodynamic loads over the wing are computed using aerodynamic influence coefficient matrices and a rational function approximation.