高速列车多目标约束横向半主动控制算法研究

Research on Multi-objective Constrained Transverse Semi-active Control Algorithm for High-speed Trains

传统的高速列车横向半主动控制研究,主要以提高车体横向运行平稳性为目的;但车体与各部件之间通过二系悬挂与一系悬挂连接传递相互耦合振动作用,因此半主动控制在改善车体横向平稳性的同时,将导致构架横向振动和轮轨横向作用加剧,从而使得列车脱轨系数增大,列车运行安全性能变差;针对这一问题,提出在虚拟惯性阻尼半主动控制和脱轨安全半主动控制的基础上,设计两个控制回路的多目标约束下的混合半主动控制算法,在实现列车横向半主动控制提高平稳性的同时,控制脱轨系数的恶化,从而同时提高列车平稳性和脱轨安全性能;并利用Simpack建立了某型高速列车多刚体动力学模型,联合Matlab/Simulink建立了联合仿真分析系统对车体横向半主动控制进行研究;结果表明:采用多目标约束半主动控制算法后,车体横向振动加速度峰值和均方根值分别降低了36%和34%,平稳性改善了15%,脱轨系数减小了17%;可见采用多目标约束半主动控制算法不仅能够有效抑制车体横向振动,改善列车运行平稳性,而且还能减小列车脱轨系数,提高列车运行安全性。

The research on the lateral semi-active control of high-speed train is mainly aimed at improving the lateral running stability of the train body.However,the coupling vibration between the vehicle body and other components is transmitted through the connection between the two suspension systems and the first suspension system.Therefore,semi-active control,while improving the lateral stability of the vehicle body,will lead to the intensified transverse vibration of the frame and the transverse action of the wheel and rail,thus increasing the derailment coefficient of the train and making the train operation safety performance worse.To solve this problem,put forward in the virtual inertial damping semi-active control and derailment semi-active control,on the basis of the design constraints of the two control loops multi-objective hybrid semi-active control algorithm,in the realization of train transverse semi-active control at the same time,improve smoothness of control the deterioration of derailment coefficient,in order to improve stationarity and train derailment safety performance at the same time.In addition,Simpack was used to establish the multi-rigid body dynamics model of a high-speed train,and Matlab/Simulink was used to establish the co-simulation analysis system to study the lateral semi-active control of the vehicle body.The results show that the peak and root mean square values of lateral vibration acceleration of the vehicle body are reduced by 36%and 34%respectively,the stability is improved by 15%,and the derailment coefficient is reduced by 17%.It can be seen that the multi-objective constrained semi-active control algorithm can not only effectively restrain the lateral vibration of the vehicle body,but also improve the train running stability.It can also reduce the derailment coefficient and improve the safety of train operation.