Analysis on the Effect of Controller Time Delay on the Stability of Maglev System

Xiaohao CHEN; Weihua MA

doi:10.13890/j.issn.1000-128x.2019.02.029

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Analysis on the Effect of Controller Time Delay on the Stability of Maglev System

更新时间：2021-12-13

- Analysis on the Effect of Controller Time Delay on the Stability of Maglev System
- Electric Drive for Locomotives Issue 2, Pages: 139-143,147(2019)
- 作者机构：
  
  1.西南交通大学　牵引动力国家重点实验室，四川　成都　610031
- 作者简介：
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- DOI：10.13890/j.issn.1000-128x.2019.02.029
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Xiaohao CHEN, Weihua MA. Analysis on the Effect of Controller Time Delay on the Stability of Maglev System. [J]. Electric Drive for Locomotives (2):139-143,147(2019)
DOI：

Xiaohao CHEN, Weihua MA. Analysis on the Effect of Controller Time Delay on the Stability of Maglev System. [J]. Electric Drive for Locomotives (2):139-143,147(2019) DOI： 10.13890/j.issn.1000-128x.2019.02.029.

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。

Abstract

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 single-degree-of-freedom maglev bench was developed. The correctness of the theoretical analysis was verified by numerical simulation and bench test.

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

Keywords

maglev systemcontroller time delayHopf bifurcationexperimental benchdelay critical valuemaglev train

references

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