Report describes flight measurements and frequency-domain analyses of aeroelastic vibrational modes of wings of XV-15 tilt-rotor aircraft. Begins with description of flight-test methods. Followed by brief discussion of methods of analysis, which include Fourier-transform computations using chirp z transformers, use of coherence and other spectral functions, and methods and computer programs to obtain frequencies and damping coefficients from measurements. Includes brief description of results of flight tests and comparisions among various experimental and theoretical results. Ends with section on conclusions and recommended improvements in techniques.
Frequency-Domain Identification Of Aeroelastic Modes
NASA Tech Briefs ; 15 , 12
1991-12-01
Miscellaneous
No indication
English
Using Frequency-Domain Methods to Identify XV-15 Aeroelastic Modes
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