Active compensation of vibrational interference in measurements of turbulent pressure fluctuations

The problem of active interference suppression is examined in relation to the measurements of turbulent pressure fluctuations by miniature piezoelectric detectors, the vibration of such detectors being a common factor complicating turbulent pressure measurements. The design and operation of a turbulent pressure detector with active vibrocompensation are described, and some test results are presented. It is shown that the active compensation method makes it possible to reduce the level of vibrational interference by 20-30 dB, thus substantially increasing the accuracy of the measurements.