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Using Frequency Domain Methods To Identify Xv 15 Aeroelastic Modes by C. W. Acree

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1NASA Technical Reports Server (NTRS) 19880008262: Using Frequency-domain Methods To Identify XV-15 Aeroelastic Modes

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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.

“NASA Technical Reports Server (NTRS) 19880008262: Using Frequency-domain Methods To Identify XV-15 Aeroelastic Modes” Metadata:

  • Title: ➤  NASA Technical Reports Server (NTRS) 19880008262: Using Frequency-domain Methods To Identify XV-15 Aeroelastic Modes
  • Author: ➤  
  • Language: English

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The book is available for download in "texts" format, the size of the file-s is: 24.35 Mbs, the file-s for this book were downloaded 70 times, the file-s went public at Mon Sep 19 2016.

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2DTIC ADA194156: Using Frequency-Domain Methods To Identify XV-15 Aeroelastic Modes.

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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. Keywords: Tilt rotor aircraft.

“DTIC ADA194156: Using Frequency-Domain Methods To Identify XV-15 Aeroelastic Modes.” Metadata:

  • Title: ➤  DTIC ADA194156: Using Frequency-Domain Methods To Identify XV-15 Aeroelastic Modes.
  • Author: ➤  
  • Language: English

“DTIC ADA194156: Using Frequency-Domain Methods To Identify XV-15 Aeroelastic Modes.” Subjects and Themes:

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The book is available for download in "texts" format, the size of the file-s is: 16.51 Mbs, the file-s for this book were downloaded 61 times, the file-s went public at Sun Feb 18 2018.

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