基于随机共振与蝙蝠算法的高速动车组滚动轴承故障诊断

仿真计算滚动轴承外圈故障引起的冲击信号,并将其作为轨道车辆的激励,输入到高速动车组整车模型的故障轴承位置.模拟列车运行,采集列车轴箱处的垂向加速度信号作为故障诊断信号,提出基于蝙蝠算法的自适应随机共振信号处理方法对其进行处理.提出故障诊断指标L的计算方法和基于L的一种新的高速动车组滚动轴承早期外圈故障的在途诊断方法.动...

Bearing fault diagnosis of high-speed EMUs based on stochastic resonance and bat algorithm

The signal of impact excitation caused by the fault of outer ring of the bearing of EMUs were analyzed.Based on the dynamic model of CRH3,the operations of the train with the impact excitation putted on the part of fault bearing were simulated.Extracted the vertical acceleration signal at the axle-box as the input signal.Then,the input signal was processed with the method of adaptive stochastic resonance based on the bat algorithm.A new fault diagnosis indicator and its calculation method were proposed.In addition,a new method for the bearing fault diagnosis of EMUs was proposed based on the indicator and the processed signal.The result of dynamic simulation and data processing shows that the proposed signal processing method has great effect in separating the fault signal,and the method proposed for early bearing fault diagnosis of highspeed EMUs is effective.