Title :
Probabilistic inter-disturbance interval estimation for bearing fault diagnosis
Author :
Wilson, Kevin W.
Author_Institution :
Mitsubishi Electr. Res. Lab., Cambridge, MA, USA
fDate :
Aug. 31 20096-Sept. 3 2009
Abstract :
We describe a new method for detecting characteristic bearing fault signatures from accelerometer vibration data based on a probabilistic model of the fault signal generation process. It is common to assume that single-point bearing defects cause periodic disturbances in bearing vibration signals, but this assumption may not be valid in practice. Our new method is less sensitive to departures from periodicity, such as fault disturbance amplitude and timing variations, than standard spectral or autocorrelation-based approaches. We demonstrate the utility of our method by distinguishing among inner race, outer race, and rolling element faults in a bearing fault test rig. Our method is significantly better than standard techniques at detecting rolling element (ball) faults.
Keywords :
accelerometers; fault diagnosis; machine bearings; probability; vibrations; accelerometer vibration; bearing fault diagnosis; fault signal generation process; probabilistic model; rolling element faults; Autocorrelation; Data mining; Fault detection; Fault diagnosis; Frequency; Hidden Markov models; Machine learning; Shape; Signal analysis; Training data; bearing fault classification; condition monitoring; fault diagnosis; vibration;
Conference_Titel :
Diagnostics for Electric Machines, Power Electronics and Drives, 2009. SDEMPED 2009. IEEE International Symposium on
Conference_Location :
Cargese
Print_ISBN :
978-1-4244-3441-1
DOI :
10.1109/DEMPED.2009.5292803