A simple method for amplitude/phase calibration of tri-axial accelerometers in the low-frequency range is proposed, based on a linear slide, used to excite all the axes of the accelerometer at the same time, and a Laser Doppler Vibrometer (LDV) as a reference. For the phase evaluation a cross-correlation analysis has been carried out. The procedure includes many validation actions in order to verify the correctness of data processing and to reduce the calibration uncertainty. Results show that the phase is a critical aspect to consider, more than the amplitude, and the comparison with the theoretical model is useful to verify the hypotheses. Different behaviors result depending on the elements of the measurement chain and not only on the type of accelerometer.

A simple method for amplitude/phase calibration of tri-axial accelerometers in the low frequency range

Antonella Gaspari;
2018

Abstract

A simple method for amplitude/phase calibration of tri-axial accelerometers in the low-frequency range is proposed, based on a linear slide, used to excite all the axes of the accelerometer at the same time, and a Laser Doppler Vibrometer (LDV) as a reference. For the phase evaluation a cross-correlation analysis has been carried out. The procedure includes many validation actions in order to verify the correctness of data processing and to reduce the calibration uncertainty. Results show that the phase is a critical aspect to consider, more than the amplitude, and the comparison with the theoretical model is useful to verify the hypotheses. Different behaviors result depending on the elements of the measurement chain and not only on the type of accelerometer.
13th Intl CONFERENCE on VIBRATION MEASUREMENTS by LASER and NONCONTACT TECHNIQUES
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11589/239156
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