摘要
为研究EMS型磁浮列车悬浮控制器的时滞对磁浮稳定性的影响,解决磁浮列车悬浮不稳的问题,建立了基于双环反馈控制系统的单自由度电磁悬浮模型;以控制器时滞作为参量,通过Routh-Hurwitz稳定性判据判断系统特征根分布,定量给出了系统发生Hopf分岔的时滞临界值,并指出控制器时滞大于临界值时,系统平衡点不再稳定。研制了一种单自由度悬浮试验台,通过数值仿真与台架试验验证了理论分析的正确性。
In order to study the effect of the time delay on the stability of EMS maglev train and solve the problem of instability of maglev train,a single degree of freedom electromagnetic suspension model based on double loop feedback control system was established.Based on the time delay of controller,the Routh-Hurwitz stability criterion was used to determine the characteristic root distribution of the system.The critical threshold of Hopf bifurcation was provided quantitatively.It was pointed out that when the controller delay was larger than the critical value,the system equilibrium point was no longer stable.A singledegree-of-freedom maglev bench was developed.The correctness of the theoretical analysis was verified by numerical simulation and bench test.
作者
陈晓昊
马卫华
CHEN Xiaohao;MAWeihua(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)
出处
《机车电传动》
北大核心
2019年第2期139-143,147,共6页
Electric Drive for Locomotives
关键词
磁浮系统
控制器时滞
HOPF分岔
试验台
时滞临界值
磁浮列车
maglev system
controller time delay
Hopf bifurcation
experimental bench
delay critical value
maglev train
