Investigation Of Modeling On High-speed Railway Vehicle And Simulation About Its Lateral Semi-active Controling Strategies

Along with the increase of high-speed railway vehicle,the vibration enhances.Atpresent,the high-speed railway vehicl lateral ride quality turns worse while thevertical ride quality can be basically adapted,which also can leads to saftyproblems.Adopting the semi-active suspension is the effective approaches to improvethe lateral ride quality.This thesis first introduces vehicle active and semi-active suspension technologyat home and abroad. Several semi-active strategies of attenuating vibration forHigh-speed railway vehicle are discussed.Secondly,17degrees of freedom lateral dynamics model of high-speed trainsbased on Matlab/Simulink and34degrees of freedom vehicle model with consideringthe wheel-rail contact based on Adams/Rail are established. Comparing twohigh-speed vehicle dynamics model, this thesis proves the rationality and correctnessof the two models.To combine the Semi-active control algorithm written in Simulink and34degrees of freedom vehicle model established in Adams/Rail，a simulation platform iscreated. The skyhook control method is investigated based on this platform, thesimulation results prove that the skyhook control algorithm is practical andeffective.This thesis also studies the control effect using the model coupledsemi-active shock absorber system model with vehicle model. The simulation resultsshow the coupling model not influences the control results much.According to the practical problem, the fuzzy skyhook method is putforward.The research show that this method not only has excellent control result,butalso makes up the disadvantage of the on-off and continuous skyhook dampingmethods.Skyhook damping control method can reduce the vehicle lateral vibration, Butthe bogie and wheel set lateral vibration increases. To solve the problem above, thisthesis put forward the mixed damping control which Combines the skyhook withgroundhook damping control. Results show that mixed damping control considersboth the high-speed railway vehicle comfort and safety, having better comprehensiveperformance.