Incrementally accumulated holographic SDP characteristic fusion method in ship propulsion shaft bearing fault diagnosis
Xuewei Song, Zhiqiang Liao, Hongfeng Wang, Weiwei Song, Peng Chen
Abstract
Abstract To improve the accuracy of the fault diagnosis of a ship propulsion shaft bearing in a harsh working environment, a visual diagnosis method based on the incrementally accumulated holographic symmetrical dot pattern (SDP) characteristic fusion method is proposed in this research. The current study simultaneously extracts the time- and frequency-domain characteristic parameters of a vibration signal based on the incremental accumulation method to avoid the inconspicuous difference and small discrimination generated by a single parameter. Subsequently, the extracted characteristic signals are transformed into a 2D image based on the SDP method to enhance the differences between signals. Eventually, bearing fault is diagnosed based on the similarity recognition method. Simulation and engineering experiments were conducted to verify the effectiveness of the proposed method. The results demonstrate that the proposed method can effectively diagnose the ship propulsion shaft bearing fault diagnosis.