Improved Methods for Digital Measurement of Torsional Vibration

Paper #:
  • 962204

Published:
  • 1996-10-01
Citation:
Williams, J., "Improved Methods for Digital Measurement of Torsional Vibration," SAE Technical Paper 962204, 1996, https://doi.org/10.4271/962204.
Author(s):
Pages:
9
Abstract:
An overview of analog and digital torsional vibration measurement methods is presented. Significant sources of digital measurement error are discussed in detail. Methods to minimize measurement errors are explored. A method to use multi-bit A/D data acquisition of a magnetic pickup signal to accurately measure tooth passing frequency with low sample rates is proposed. A frequency domain correction window is proposed which improves the frequency response of the standard digital demodulation technique. The proposed improvements enable accurate torsional vibration measurement with inexpensive A/D data acquisition equipment.
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