Design Of Pantograph Active Control System Reducing The Pantograph-catenary Wear

The high-speed railway is a major technical achievements of the world railways, withlarge transport capacity, safety and comfort, all-weather transport, environment-friendly andsustainability advantages. With the improvement of the speed of high speed railway, thepantograph-catenary wear are becoming increasingly prominent, and has gradually become oneof the key issues constraining the safe operation of trains and continue to improve the speed.Especially in the situation of shortages of global resources and energy，environmental problems,domestic and foreign scholars and technicians have payed extensive attention to the research onwear and active control of the pantograph-catenary.Under the background of rapid development of the high-speed railway in China,pantograph active control system reducing the pantograph-catenary wear is designed, in themethods of combination of simulation analysis and experimental verification, which is basedon the principle of tribology, sliding electrical contact theory and the modern control theory,and combined with the micro control technology and the experiment of friction and wear withelectric current.The main research results are as follows:1. With a combined method of simulation analysis and experimental verification, tostudy the pantograph-catenary temperature field under different working conditions; throughregression analysis, the nonlinear regression model of the optimal contact force is calculated,corresponding to the minimum amount of pantograph-catenary wear.2. Based on tribological principle and the modern control theory, the Simulink model ofpantograph and pneumatic servo system is built, and the LQG optimal active control systemreducing the wear of pantograph-catenary is designed.This paper’s main conclusions are as follows:1. Based on COMSOL Multiphysics finite element analysis of temperature field of thepantograph slider and contact line, the simulation results show that: the wear amount of thepantograph-catenary under the action of the optimal normal force, is increased as the currentincreases and increased as the speed increases. This is consistent with the experimentalconclusions, proves that the multi-physics finite element method for analysis ofpantograph-catenary’s friction and wear with electric current problems is effective.2. By combining the theory of tribology and the friction and wear with electric currentexperiments, the control effects of pantograph-catenary wear were assessed usingmulti-physics finite element method calculation. The results show that: the LQG optimalactive control strategy of pantograph can inhibit the pantograph-catenary contact surface is damaged, to improve the friction and wear properties of the pantograph-catenary, to play arole in reducing the wear amount of the pantograph-catenary.In the case of the current state of energy gap is growing and the railway transportation inthe national economy is becoming more and more important, to carry out research on activecontrol pantograph aimed at reducing pantograph-catenary wear, has important practicalsignificance for improving the pantograph-catenary service life, reducing the operating costsof the railway, adapting to the development of China’s high-speed railway technology, andhas a very important social significance for solving the resource, energy, environment andsustainable development issues facing the sustainable development of our national economy,to achieve the development strategic of building a resource-saving and environment-friendlysociety.