A method for correcting the high-frequency mechanical vibration effects in the dynamic calibration of pressure measurement systems using a shock tube

The extremely rapid reflection of a shock wave from the end wall generated in tube, addition to high-frequency content pressure, inevitably also excites mechanical vibrations. These can potentially produce acceleration-induced spurious signals as part dynamic output pressure measurement system being calibrated. This paper proposes and evaluates method for correcting frequency response obtained with calibration using tube errors due proposed is based on predetermined accelerations simultaneous measurements vibration sensor during its tube. were corrected piezoelectric calibrated diaphragmless developed at National laboratory vacuum RISE Research Institutes Sweden, where different vibrational conditions induced by changing initial driver while keeping driven constant. uncertainty correction was determined considering contributions measured acceleration system, reference end-wall step repeatability correction. results show that effectively eliminates sensitivity phase responses an acceleration-sensitive