基于MATLAB软件的动车组转向架悬挂系统半主动控制仿真分析

基于CRH2高速动车组转向架悬挂系统结构,对列车垂直、水平两个方向建立动力学模型。利用模糊控制理论,对影响车辆运行平稳性的沉浮、点头、横移、侧滚及摇头等刚体振动进行控制策略分析。根据半主动控制系统的特性要求,提出采用磁流变阻尼替换原有油液阻尼,达到降低车体各个方向的振动加速度从而提升车体稳定性的目的。以中国干线铁路轨道功率谱密度为轨面激励发生基础,联合MATLAB软件中的Simulink模块进行整车性能仿真研究。仿真结果显示,该半主动控制悬挂系统能够较好地抑制两个方向的5种振动模式,对于改善车辆运行平稳性、降低转向架所受冲击力有良好的作用,在设计上可使用半主动控制的磁流变悬挂系统代替传统铁道车辆被动悬挂控制。

Simulation Analysis of Semi-active Control of EMU Bogie Suspension System Based on MATLAB

Based on the bogie suspension system structure of CRH2 high-speed EMU,the dynamic models of the train in both vertical and horizontal directions are established.Fuzzy control theory is used to control the rigid body vibration that affects the stability of the vehicle,such as floating,nodding,sideways moving,rolling and shaking head.According to the characteristic requirements of semi-active control system,the magnetorheological damping system is proposed to replace the original oil damping system,so as to reduce the vibration acceleration in all directions and to improve vehicle body stability.Taking the power spectral density of China trunk railway track as the basis of rail surface excitation,Simulink module in MATLAB is used to carry out whole vehicle performance simulation research.Results show that the semi-active control suspension system can effectively suppress 5 vibration modes in 2 directions,creating positive impact on improving vehicle operational stability and reducing impact force on the bogie.At the design level,semi-active magnetorheological suspension system can be used to replace the conventional rail vehicle passive control suspension system.