Experimental Error Study of Q-Flex and Si-Flex Accelerometers in Case of Mechanical Vibration

The work gives the results of experimental studies of a number of domestic Q-flex (AK-18), Si-flex (A-18, A-18T) and foreign Q-flex (Е1) accelerometers on exposure to harmonic and random mechanical vibrations. Findings of the research show that domestic accelerometers have higher resistibility, but lower vibration resistance. We found that the accelerometer bandwidth did not affect the vibration surface. The actual error of the accelerometer has a maximum in the frequency range of 600.800 Hz and 1800.2000 Hz. The vibration error increases at high amplitudes of vibration. The voltage-to-digit converter has the error at conversion frequency, caused by the stroboscopic effect. The results of our study bring us to the conclusion that currently it is difficult to use most Q-flex and the Si-flex accelerometers without shock absorbers.

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