Amplitude–phase calibration of tri-axial accelerometers in the low-frequency range by a LDV
<p>A method for amplitude–phase calibration of tri-axial accelerometers in the low-frequency range (0 to 20 Hz) 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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-05-01
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| Series: | Journal of Sensors and Sensor Systems |
| Online Access: | https://www.j-sens-sens-syst.net/8/223/2019/jsss-8-223-2019.pdf |
| Summary: | <p>A method for amplitude–phase calibration of tri-axial
accelerometers in the low-frequency range (0 to 20 Hz) 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 different methods, like cross-correlation analysis
and cross-spectrum analysis, have also been used for validation purposes. The procedure
includes many further validation actions in order to verify the correctness
of modelling of the systems being tested, of the data processing and to reduce
the calibration uncertainty.</p>
<p>Results show that the phase is a critical aspect to consider in calibration,
more than the amplitude, and the comparison with the theoretical model is
useful to verify the hypotheses. Different behaviours result depending on
the elements of the measurement chain and not only on the type of
accelerometer.</p> |
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| ISSN: | 2194-8771 2194-878X |