Errors in accelerometer calibration using laser interferometry due to harmonic distortion and cross motion in the applied motion

Bev Payne; David J. Evans

doi:10.1117/12.386750

22 May 2000 Errors in accelerometer calibration using laser interferometry due to harmonic distortion and cross motion in the applied motion

Bev Payne, David J. Evans

Author Affiliations +

Proceedings Volume 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2000) https://doi.org/10.1117/12.386750
Event: 4th International Conference on Vibration Measurement by Laser Techniques, 2000, Ancona, Italy

Abstract

The development of mechanical vibration generators (shakers) used in the precise calibration of accelerometers requires minimizing the amount of distortion and cross (transverse) motion present in the vibration of the moving element of the shaker. It is well known that both distortion and cross motion can introduce significant errors in the calibration of accelerometers. Potential effects on measured sensitivity due to the presence of harmonic distortion were determined experimentally. Varying amounts of harmonic distortion were systematically introduced into the drive signal of a shaker. Changes in the measured sensitivity of an accelerometer were noted for these varied amounts of distortion and compared with theoretical predictions. Measurements of the sensitivity of an accelerometer were also made using moving elements having varying amounts of cross motion in order to experimentally determine potential effects due to the presence of cross motion on measured sensitivity. The results of this study should be helpful in the development of error budgets for accelerometer calibration systems and in the design of shakers used as a part of such systems.

Citation Download Citation

Bev Payne and David J. Evans "Errors in accelerometer calibration using laser interferometry due to harmonic distortion and cross motion in the applied motion", Proc. SPIE 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2000); https://doi.org/10.1117/12.386750

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