Abstract
The vibration fault signal recorded from a faulty bearing is generally non-stationary in nature and the envelope of such a signal is usually time-varying. This may bring challenges to bearing fault detection. To overcome such difficulties, a novel energy demodulation technique is proposed in this work, which first interpolates the raw signals with nonuniform B-spline approximation and then utilizes an energy demodulation tool based on an enhanced energy measure called envelope-derivative operator (EDO). The B-spline approximation and the EDO are integrated into a new energy operator for extracting the fault signatures. The B-spline EDO enjoys high time resolution and performs well in the case of strong noise. The superiority of the spline-based EDO in dealing with strong noise is demonstrated by simulation and real experiments.
Original language | English |
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Article number | 110635 |
Journal | Measurement: Journal of the International Measurement Confederation |
Volume | 189 |
DOIs | |
State | Published - 15 Feb 2022 |
Keywords
- B-spline approximation
- Bearing fault detection
- Energy measurement
- Envelope-derivative operator