NASA Technical Memorandum

NASA Technical Memorandum
Author:
Publisher:
Total Pages: 296
Release: 1991
Genre: Aeronautics
ISBN:

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Improved Wind Tunnel Data Reduction Procedure

Improved Wind Tunnel Data Reduction Procedure
Author:
Publisher:
Total Pages: 0
Release: 1996
Genre:
ISBN:

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This project examines the motion and aerodynamic data associated with dynamic wind tunnel tests. Historically, the aerodynamic data measured with dynamic testing has not correlated well with actual flight data, and in general has not been used in system simulations for aircrew training or flight analysis. An improved data reduction method is presented to extract signal data from dynamic tests. The reduction method applies a Fourier series approximation fit to oscillatory data, and a linear regression fit to steady state data. Both methods provide good signal extraction and data smoothing. Additionally, the report documents methods and equations developed by Juri Kalviste for the handling, analysis, and simulation of dynamic data. A prototype software program has been developed to exercise the reduction methods. The program uses a new modeling architecture that enables rapid, seamless incorporation of alternative reduction or aerodynamic modeling methods.

Analysis of Wind-tunnel Dynamic Stability Testing Methods and Data Reduction

Analysis of Wind-tunnel Dynamic Stability Testing Methods and Data Reduction
Author: Rodman N. Leach
Publisher:
Total Pages: 26
Release: 1958
Genre: Data reduction
ISBN:

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The method of data reduction employed for dynamic stability wind-tunnel tests is discussed and suggestions to improve the quality of the data are made.