Estimation of Wheel/Rail Contact Forces Based on an Inverse Technique
For actual operating conditions, wheel/rail contact forces of high-speed train are very difficult to directly measure. Minimizing the role of driving force between wheel and rail is a key point to ensure railway wheel-rail transport systems in good condition and efficient operation in the long-term. A time-domain inversion method for dynamic loads was proposed. Based on the state space equation, dynamic programming methods and the Bellman principle of optimality, the main theoretical derivation of the inversion mathematical model was given. With a high-speed vehicle system as the research object, accelerations of axle box as input conditions, the vertical and horizontal wheel/rail forces were identified. Inverse results were compared with SIMPACK simulation results which had the same kinetic parameters. The results indicate that the vertical and horizontal wheel/rail forces had the same trend with SIMPACK simulation results. Results from the inverse model were also compared with experiment data. The inverse model has high inverse accuracy, and can be used for real-time monitoring of the running train wheel/rail contact forces.
inverse technique wheel/rail contact force SIMPACK simulation experiment data
Tao Zhu Shoune Xiao Guangwu Yang Mingmeng Wang
State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China
国际会议
北京
英文
1-7
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）