Research On Structure And Control Of Anti-yaw Damper For Electric Multiple Units Based On Magnetorheological Technology

How the anti-yaw damper in high-speed trains can better suppress the snaking motion is of great research significance.The higher the vehicle speed,the greater the damping force provided by the anti-yaw damper.The lower the vehicle speed,the smaller the damping force provided by the anti-yaw damper.Traditional anti-yaw damper cannot adjust the damping force in time to meet different operating conditions.Since the Magnetorheological Damper(MR Damper)has the advantages of fast response speed and continuous adjustment,the research on the anti-yaw damper,structural optimization design and control simulation of the train based on the MR technology can solve this problem contradiction.Through numerical analysis of the damping force calculation model and the magnetic field calculation model,it provides a theoretical basis for structural optimization design and control research.Then use dynamics simulation software to establish the dynamic models of two types of high-speed train trailers(empty cars)and high-speed trains(capacity),and set different anti-yaw damper(multiple)deviations.The optimal damping adjustable range for the optimal design of the anti-yaw damper structure is determined to be 8.5k N-17 k N According to the optimal damping adjustable range,the structural parameters of the anti-yaw MR damper are designed and calculated,and the optimized structure of the magnetic circuit is simulated and analyzed.On the one hand,the rationality of the optimal design of the ring magnetic circuit structure is verified.On the other hand,it was verified that the output damping force of the shock absorber between the control current 0-2A satisfies 8.5k N-17 k N.In order to verify whether the structural optimization design of the MR damper satisfies the actual operating conditions of high-speed trains,the train dynamics model and the control simulation program are co-simulated based on the switchable fuzzy control based on the deduced numerical model.The results show that the switchable fuzzy control has a minimum increase of 12.6% and a maximum of 25.7% compared with the non-linear critical speed without control.The derailment coefficient has a minimum decrease of 6.5% and a maximum decrease of 11%.It can effectively solve the contradiction that traditional anti-yaw damper cannot adjust the damping force in time to meet different operating conditions.