Using Frequency-Domain Methods to Identify XV-15 Aeroelastic Modes

Format:

Conference/Event

Author/Creator:

Acree, C. W., author.

Conference Name:

SAE International Powered Lift Conference and Exposition (1987-12-07 : Santa Clara, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1987

Summary:

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) with cross-spectral and transfer-function methods. Modal frequencies and damping were determined by performing curve fits to transfer-function magnitude and phase data and to cross-spectral magnitude data. Results are given for the XV-15 with its original metal rotor blades. Frequency and damping values are also compared with earlier predictions

Notes:

Vendor supplied data

Publisher Number:

872385

Access Restriction:

Restricted for use by site license