An Analysis Method for the Correlation between Catenary Irregularities and Pantograph-catenary Contact Force

摘要

Pantograph-catenary contact force provides the main basis for evaluation of current quality collection; however,the pantograph-catenary contact force is largely affected by the catenary irregularities. To analyze the correlatedrelationship between catenary irregularities and pantograph-catenary contact force, a method based on NARX(Nonlinear Auto-Regressive with eXogenous input) neural networks was developed. First, to collect the test dataof catenary irregularities and contact force, the pantograph/catenary dynamics model was established anddynamic simulation was conducted using MATLAB/Simulink. Second, catenary irregularities were used as theinput to NARX neural network and the contact force was determined as output of the NARX neural network, inwhich the neural network was trained by an improved training mechanism based on the regularization algorithm.Third, the simulation results and the comparison with other algorithms indicate the validity and superiority ofthe proposed approach.