Fault Investigation of Rolling Element Bearing using Soft Computing
- Vol 6 (1) Jan- Apr
- New Delhi STM Journals 2019
- 8-19p
Rolling element bearing is the most significant mechanical component of any rotating machinery and used in vast applications from the surgical machine tool to aircraft etc. In the present research, an experimental investigation has been done using vibration analysis, continuous wavelet transform (CWT), and soft computing, i.e., support vector machine (SVM) and k-nearest neighbor (k-NN) for fault detection and diagnosis of rolling element bearing. Vibration signatures in the time domain are acquired from healthy and faulty bearings. Four complex-valued wavelets are considered. Out of four wavelets, mother wavelet is selected using relative wavelet energy (RWE) criterion and extracts the statistical features from the wavelet coefficient of raw vibration signatures. These statistical features are used as input of support vector machine and k-nearest neighbor for classification of faults. Finally, complex Morlet wavelet is selected and reports better results with support vector machine algorithm.