ZHANG Dongxing, YANG Gang, ZHOU Ao, et al. Research on axle-box bearing fault feature extraction algorithm based on simulation test and BOA-VMD. [J]. Electric drive for locomotives (2):105-112(2022)
DOI:
ZHANG Dongxing, YANG Gang, ZHOU Ao, et al. Research on axle-box bearing fault feature extraction algorithm based on simulation test and BOA-VMD. [J]. Electric drive for locomotives (2):105-112(2022) DOI: 10.13890/j.issn.1000-128X.2022.02.015.
Research on axle-box bearing fault feature extraction algorithm based on simulation test and BOA-VMD
VMD)参数进行优化的轴承故障特征提取方法。首先构建基于轴承-车辆刚柔耦合的轴承故障动力学模型,提取轮轨激扰和轴承故障情况下的轴箱振动信号;然后利用蝴蝶优化算法对轴箱振动信号的VMD模态分量数和二次惩罚系数进行寻优,确定最佳参数组合;最后利用已确定的最佳参数对轴承振动信号进行VMD分解,得到不同本征模态分量(Intrinsic Mode Function
Aiming at the problem that axle-box bearing faults are difficult to find during the operation of urban rail trains
a bearing fault feature extraction based on variational mode decomposition (VMD) parameter optimization using butterfly optimization algorithm (BOA) was proposed. Firstly
a bearing fault dynamic model based on the rigid-flexible coupling of bearing-vehicle was constructed
and the vibration signal of the axle box under the wheel-rail disturbance and the faulty bearing was extracted. Then
the BOA algorithm is used to optimize the VMD modal component number and the second penalty coefficient of the axle box vibration signal
so as to determine the best parameter combination. Finally
by using the determined optimal parameters
the vibration signal of the bearing was decomposed by VMD to obtain different intrinsic mode components (intrinsic mode function
IMF)
and an envelope analysis was performed to find the eigen frequencies of bearing failures. Through the experimental analysis
it can be seen that the VMD analysis method of optimizing parameters can effectively find the characteristic frequency of bearing faults
and by comparing the EMD analysis method
it can be found that the analysis method proposed in this paper is more effective.
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