Correcting distortion in acoustic sense lines

Автор: Gregory Don A., Korman Valentin, Wiley John, Vitarius Patrick J.

Журнал: Техническая акустика @ejta

Статья в выпуске: т.7, 2007 года.

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Pressure sense lines, as employed in the measurement of rocket engine test firings, can propagate the time-domain pressure signal out of hostile regions, which allows the use of instrumentation with fragile pressure transducers. In such applications, it is necessary to correct the data to account for attenuation and resonance due to the sense line. One technique for doing this involves the application of Fourier transform theory to obtain the transfer function of the sense line. Various techniques for obtaining the transfer function are explored, including the use of Gaussian noise, single frequency sweeps, and impulse signals as input functions. The transfer function thus obtained is then mathematically fit, scaled, and validated against a related rocket engine test.


Acoustical measurements, rocket engine noise, fourier transform, transfer function

Короткий адрес:

IDR: 14316070

Список литературы Correcting distortion in acoustic sense lines

  • Vitarius P., Gregory D. A., Wiley J., and Korman V. Acoustic Wave Propagation in Pressure Sense Lines. 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, AIAA-2003-5182, AIAA, Washington, DC, 2003.
  • Irwin H. P. A. H., Cooper K. R., and Girard R. Correction of Distortion Effects Caused by Tubing Systems in Measurements of Fluctuating Pressures. J. Ind. Aerodyn., 5 (1979), pp. 93-107.
  • Swalwell K. E., Sheridan J., and Melbourne W. E. Frequency Analysis of Surface Pressures on an Airfoil After Stall. 21st AIAA Applied Aerodynamics Conference, AIAA-2003-3416, AIAA, Washington, D.C., 2003.
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