Monitoring bearing performance
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United States of America Patent
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Oct 18, 2005
Grant Date -
May 13, 2004
app pub date -
Jun 13, 2003
filing date -
Jun 16, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Techniques for qualifying and monitoring bearing performance and condition in a rotary servo systems (e.g., galvanometer scanner) are disclosed. A position error signal is analyzed for signal anomalies that can signify bearing damage. A DC offset ramp is applied to the position error signal to test whether the anomaly is angular position dependent. The anomaly is associated with the corresponding command signal value and range of values to calculate the angular position and range of the apparent bearing damage. The amplitude of the anomaly is measured and associated with a relative degree of bearing damage.
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