The wheel-rail adhesion control for regenerative braking systems of high speed electric multiple unit trains is crucial to maintaining the stability,improving the adhesion utilization,and achieving deep energy recover...The wheel-rail adhesion control for regenerative braking systems of high speed electric multiple unit trains is crucial to maintaining the stability,improving the adhesion utilization,and achieving deep energy recovery.There remain technical challenges mainly because of the nonlinear,uncertain,and varying features of wheel-rail contact conditions.This research analyzes the torque transmitting behavior during regenerative braking,and proposes a novel methodology to detect the wheel-rail adhesion stability.Then,applications to the wheel slip prevention during braking are investigated,and the optimal slip ratio control scheme is proposed,which is based on a novel optimal reference generation of the slip ratio and a robust sliding mode control.The proposed methodology achieves the optimal braking performancewithoutthewheel-railcontactinformation.Numerical simulation results for uncertain slippery rails verify the effectiveness of the proposed methodology.展开更多
高速铁路动车组在运行过程中会出现牵引网低频振荡现象,目前对其机理研究处于初期阶段。针对动车组网侧整流器(line-side converter,LSC)采用基于传统PI控制器的瞬态直接电流控制策略(transient current control strategy,TCCS)在发生...高速铁路动车组在运行过程中会出现牵引网低频振荡现象,目前对其机理研究处于初期阶段。针对动车组网侧整流器(line-side converter,LSC)采用基于传统PI控制器的瞬态直接电流控制策略(transient current control strategy,TCCS)在发生牵引网低频振荡时通过调节PI控制器参数来抑制振荡的局限性,文中提出将内模控制应用到TCCS中,设计二自由度内模控制器,并用它代替TCCS中的传统PI控制器。然后,仿真对比不同控制策略下LSC的工作特性。最后,将不同控制策略分别应用于车网系统仿真模型中,结果表明,基于二自由度内模控制器的TCCS拥有更好的跟随性能和抗干扰性能,并且能够有效抑制高速铁路牵引网低频振荡。展开更多
基金supported by the National Natural Science Foundation of China(Grant 51305437)Guangdong Innovative Research Team Program of China(Grant201001D0104648280)
文摘The wheel-rail adhesion control for regenerative braking systems of high speed electric multiple unit trains is crucial to maintaining the stability,improving the adhesion utilization,and achieving deep energy recovery.There remain technical challenges mainly because of the nonlinear,uncertain,and varying features of wheel-rail contact conditions.This research analyzes the torque transmitting behavior during regenerative braking,and proposes a novel methodology to detect the wheel-rail adhesion stability.Then,applications to the wheel slip prevention during braking are investigated,and the optimal slip ratio control scheme is proposed,which is based on a novel optimal reference generation of the slip ratio and a robust sliding mode control.The proposed methodology achieves the optimal braking performancewithoutthewheel-railcontactinformation.Numerical simulation results for uncertain slippery rails verify the effectiveness of the proposed methodology.
文摘高速铁路动车组在运行过程中会出现牵引网低频振荡现象,目前对其机理研究处于初期阶段。针对动车组网侧整流器(line-side converter,LSC)采用基于传统PI控制器的瞬态直接电流控制策略(transient current control strategy,TCCS)在发生牵引网低频振荡时通过调节PI控制器参数来抑制振荡的局限性,文中提出将内模控制应用到TCCS中,设计二自由度内模控制器,并用它代替TCCS中的传统PI控制器。然后,仿真对比不同控制策略下LSC的工作特性。最后,将不同控制策略分别应用于车网系统仿真模型中,结果表明,基于二自由度内模控制器的TCCS拥有更好的跟随性能和抗干扰性能,并且能够有效抑制高速铁路牵引网低频振荡。
