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The estimation and tracking of a variable shaft speed is addressed in the paper. The practical utility of a number of estimation schemes are compared for this purpose, each of which uses timing information provided by a once-per-revolution pulse that originates from a rotating shaft. The estimation and tracking schemes include a novel approach based on a Kalman filter based estimator. Pulse gating is also investigated as a means of overcoming the problem of missing and spurious pulses. The schemes are applied to industrial data obtained from a dragline and a bearing vibration test rig.

Variable Shaft Rate Estimation and the Analysis of Nonstationary Signals from Rotating Machinery