EMS磁悬浮列车／非线性弹性轨道系统的动力学特性

Characteristics of EMS-maglev system with multi-car and nonlinear flexible guideway

建立了多车体EMS磁悬浮列车／非线性弹性轨道耦合控制系统的动力学模型．利用数值方法研究了三车体和单车体两类磁悬浮系统的动力学行为．结果表明:在运行的初始阶段,轨道对两类磁悬浮列车车体的动力响应存在很大差别．在相同的运行速度下,两类磁悬浮系统控制增益的稳定性区域不相同,进一步给出了使三车体磁悬浮列车系统保持稳定运动状态的控制增益与系统所能承受的最大悬浮干扰间的变化规律．

The dynamical model of a maglev control system of the EMS type with multi-car and nonlinear flexible guideway is established. The comparison on the dynamic characteristics is numerically conducted for two kinds of the maglev systems, in which the vehicle is, respectively, composed of three cars or a single car. The numerical results demonstrate striking dissimilarities between these two systems. There exist distinct differences in dynamic responses of the same span of guideway in initial traveling stage of the vehicle. The regions for the control gains, which keep the vehicle stable, are also different, even when the vehicle is moving at the same speed. Furthermore, the relationship between the maximum suspension disturbance and the control gains, which keeps the three-car maglev vehicle stable, is given out.