MEASUREMENT OF DYNAMIC ROCKING IN SINUSOIDAL CALIBRATION WITH AN ELECTRODYNAMIC SHAKER

A. Savarin, A. Chijioke

Abstract

Rocking motion is often a significant source of uncertainty in sinusoidal calibrations of accelerometers and force transducers. We describe real-time measurements of rocking during sinusoidal excitation, performed at NIST. The measurement is contactless and can be performed simultaneously with the motion. We report rocking measurements for excitation frequencies up to 2 kHz. The results obtained have an absolute uncertainty (<i>k</i> = 2) in the range of 0.02 µrad to 3.3 µrad and allow error due to rocking motion to be largely corrected in axial acceleration measurement.

Keywords

sinusoidal calibration; dynamic force; vibration; rocking; shaker

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IMEKO-TC22-2022-141.pdf

DOI

10.21014/tc22-2022.141

IMEKO TC

TC22 - Vibration Measurement

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