6533b870fe1ef96bd12d046e
RESEARCH PRODUCT
Observation and Processing of Instantaneous Frequency Variations During Bearing Tests
Tor I. WaagMartin Hemmersubject
VibrationRotary encoderTachometerBearing (mechanical)Computer sciencelawAcousticsCondition monitoringRotational speedInstantaneous phaseOrder trackinglaw.inventiondescription
Laboratory experiments have been performed on medium sized roller bearings with two levels of artificial damage. Recordings of long time series from accelerometers at a wide range of different radial loads and rotation speeds has been performed. Probably due to non-perfect performance of the control systems for the rotational speed or frequency, significant fluctuations were observed at all rotation speeds. The highest relative variation was observed at the lowest rotational speeds. These variations were recorded using a rotary encoder, which allows order tracking of the vibration signal. In real life condition monitoring, tachometers or rotary encoders are not always present, this can be due to the cost of installation or space limitations for introducing additional sensors. The present work describes a method for instantaneous frequency estimation, making it possible to perform order tracking without relying on a rotary encoder. These results are then verified by comparison to the rotary encoder data.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 |