A Comparative Study on The Rotational Vibration Measurement Using Ordinary Incremental and Absolute Encoders

초록

The present study evaluates two procedures for measuring the rotational vibration of a shaft, using an incremental and an absolute encoder, respectively. First, the procedures for rotational vibration measurement using the two encoders are explained. The validity of these procedures is examined through computer simulations, which demonstrate that both procedures are accurate in measuring rotational vibration. Furthermore, the simulation results for both procedures exhibit good correlations in both the time and frequency domains. Finally, the procedures are experimentally verified using a simple test setup with a universal joint to generate rotational vibration. The test results match well with each other and with the theoretical data, confirming that the proposed method is capable of accurately measuring the rotational vibration of rotating machines.

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