Robustness of the digital filter to differing calibration flows

摘要

The use of a tubing system is a common means of measuring surface pressures for wind engineering experiments. However, it introduces signal distortions on the pressure fluctuations. This is primarily addressed before data acquisition by altering the physical tube to produce a more suitable behaviour, or post-acquisition by applying a spectral filter. More recently, digital filters have been suggested for correcting the pressure distortions, providing faster correction of data by working in the time-domain. However, the reproducibility, or stability, of the filter coefficients to differing calibration flows has not been assessed. This includes the effect of different dominant frequencies and mean pressures in the calibration signal.