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Comparing Encoder and Accelerometer Measurement of Transmission Error Or Torsional Vibration
Published January 01, 1990 by Institution of Mechanical Engineers in United Kingdom
Torsional vibration on the wheel of a gearbox was measured using an optical encoder on a free shaft end and using accelerometers mounted tangentially on an auxiliary flange. Comparison of the results showed generally good agreement at frequencies up to the torsional resonance of the encoder. Errors occurred at once per revolution for the accelerometer system and also when slip ring brushes lost contact but the higher natural frequencies associated with the accelerometer assembly allowed operations up to 3kHz.