A hybrid prognosis scheme for rolling bearings based on a novel health indicator and nonlinear Wiener process
提出一种混合方法用于轴承故障预测，先构建非线性健康指标，再结合双通道Transformer网络和卷积块注意力模块提取特征，最后用非线性维纳过程进行剩余使用寿命预测和不确定性量化。
This paper proposes a novel hybrid method aiming at the fault prognosis of bearings. A nonlinear health indicator is first constructed using Complete Ensemble Empirical Mode Decomposition with Adaptive Noise and Kernel Principal Component Analysis to reflect the health state of a bearing accurately and convincingly. Subsequently, multi-domain features are extracted from vibration signals and the Dual-Channel Transformer Network with the Convolutional Block Attention Module is applied for constructing HIs of the rest bearings. Moreover, the 3σ criterion is employed to establish the condition monitoring interval of health state and detect the First Prediction Time, with which degradation modeling and probabilistic Remaining Useful Life (RUL) prediction are conducted with the assistance of nonlinear Wiener process with random effects. The superior performance of the proposed hybrid prognostic method confirms that the method contributes to the accurate RUL prediction and uncertainty quantification.