Influence of friction vibration acceleration on Pantograph catenary current carrying characteristics

The contact friction between pantograph and catenary will produce friction vibration during the actual operation of railway trains. The friction vibration will have a certain impact on the current collection quality between pantograph and catenary friction pairs. The influence of pantograph catenary friction vibration acceleration on current carrying efficiency and current carrying stability is studied by using a self-made sliding electric contact experimental machine under different basic working conditions. The correlation between friction vibration and current carrying characteristics under different working conditions is explained through the experimental data. The theoretical analysis shows that the friction vibration is the main factor affecting the current carrying characteristics between pantograph and catenary. Harris Eagle algorithm (HHO) is used to optimize the penalty parameters and kernel parameters of least squares support vector machine (LLSVM), and a regression model of current carrying stability coefficient is established. The verification results show that the model has good predictability, which provides a certain reference for pantograph catenary contact failure prediction.