A study on fault diagnosis for marine machinery bearings based on multimodal fusion and two-stage discrimination
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College of Engineering, Shanghai Ocean University, Shanghai 201306, China
Submission date: 2025-11-11
Final revision date: 2026-04-10
Acceptance date: 2026-04-16
Online publication date: 2026-04-16
Publication date: 2026-04-16
Corresponding author
Zhiyuan Feng
College of Engineering, Shanghai Ocean University, Shanghai 201306
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ABSTRACT
The marine machinery system operation is in the marine environment, all this bears greatly with this degradation in equipment performance, safety matters too, but in the marine environment which is rather complex, there are noises that make diagnosing faults in the bearing hard for these noises tend to mask or lessen fault features. Then, the conventional signal processing methods are quite sensitive to the selection of parameters for acquiring feature and it is impossible to extract fault feature due to the noisy environment which is unstable. To deal with the problem, this paper offers up a fault diagnosis configuration for bearings that employs multimode union and a twostage distinction technique. There are two stages in the framework: Stage 1 is to deal with the background noise and this not stationary vibration signal about to go through the feature boost process to separate, filter and increase the helpful signal. The second is the fault discriminating module where, using two channels from a deep network with an attention module, channels: chann1: the time domain vector of the sample and the frequency domain vector of the sample chann2: The TF images that the signal have made, meaning adding those images as channels.
ACKNOWLEDGEMENTS
The original vibration signals come from the Case Western University Bearing Data Center website.
FUNDING
This research received no external funding.
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