The XV-15 tilt-rotor wing has six major aeroelastic modes that are close in frequency. To precisely excite individual modes during flight test, dual flaperon exciters with automatic frequency-sweep controls were installed. The resulting structural data were analyzed in the frequency domain (Fourier-transformed). Modal frequencies and damping were determined by performing curve fits to frequency-response magnitude and phase data. Results are given for the XV-15 with its original metal rotor blades. Frequency and damping values are also compared with predictions by two different programs, CAMRAD and ASAP.
Identification of XV-15 aeroelastic modes using frequency sweeps
Journal of Aircraft ; 26
1989-07-01
Miscellaneous
No indication
English
Frequency-Domain Identification Of Aeroelastic Modes
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