LI Yachao, LIU Haoyu, XU Haokang, et al. Vibration amplitude prediction method for turbine rotor sliding bearing based on YOLOv8 optimized attention mechanism[J]. Thermal power generation, 2025, 54(5): 122-131.
LI Yachao, LIU Haoyu, XU Haokang, et al. Vibration amplitude prediction method for turbine rotor sliding bearing based on YOLOv8 optimized attention mechanism[J]. Thermal power generation, 2025, 54(5): 122-131. DOI: 10.19666/j.rlfd.202412263.
The early faults of sliding bearings are highly concealed. To accurately predict their vibration amplitude
a deep learning model incorporating a YOLOv8-optimized CBAM attention mechanism is proposed.The CBAM module is embedded between the Backbone and Neck to enhance the model's focus on critical vibration features. Additionally
an improved complete intersection over union loss function is employed to enhance object detection accuracy. Considering the nonlinear and non-stationary characteristics of vibration data
the empirical mode decomposition(EMD) method is integrated into the model to improve the accuracy of vibration state prediction. The experimental results show that
on the 600 MW steam turbine operation dataset
this method improves the detection accuracy by 2.85 percentage points and 8.50 percentage points compared with that of the conventional YOLOv8 and YOLOv7
respectively. Moreover
the root mean square error(RMSE) is reduces
and the mean absolute error(MAE) decreases. Furthermore
in high-noise environments
the model's error fluctuation reduces by 30% compared with that of the conventional methods
demonstrating stronger generalization ability and stability.