Bearing Damage Detection in Speed-sensorless Operated Multi-Mass-Systems

摘要

The present paper deals with the diagnosis of outer-race bearing faults in a speed-sensorless operated drive. Frequency response measurement of the mechanical two-mass-system serves as instrument for the detection of the bearing failure. Deterministic deviations from the measured curve without failure point out the presence of an outer race bearing fault even when calculated with the estimated speed from a speed-adaptive Luenberger observer structure in sensorless operation.