ANALYSIS OF DOPPLERIZED ACCELERATION SIGNALS IN A ROTATING SHAFT BY USING A VOLD-KALMAN ORDER TRACKING FILTER

摘要

Measurement of the vibration transmitted through rotating shafts such as half-shafts in vehicles is of interest in applications such as noise transfer analysis and the study of operating deflections. Vibration signals transmitted through a rotating shaft usually include six degree-of-freedom components, thus making the measurement of vibration a challenging task. In the present work, a new measurement method is presented, one that resolves the minimum of only two one-axis accelerometer signals into all components of vibration with reasonable accuracy. The method utilizes the Dopplerized signals obtained from accelerometers attached to a rotating shaft and a Vold-Kalman order tracking filter to decompose signals into orders of different vibration components. The new method proposed in the present work is verified by simulated run-up test data and applied to an experimentally obtained data set.