磁浮系统模型中用弹簧阻尼器替代控制器的等效性分析

The Analysis of the Equivalence of Substituting the Controllers with the Spring-dampers in Maglev System Model

在磁浮列车系统研究领域中,为简化计算许多文献将悬浮控制器等效为弹簧阻尼器。而对该方法的有效性,及其结果的可信度都没有做出进一步的分析。从数学模型上分析了弹簧阻尼器系统与控制系统的本质区别,并从稳定性、动态响应特征以及高频激励响应三个方面讨论了这种区别对系统性能的影响。以国防科大磁悬浮列车为被控对象进行了仿真分析,验证了两者之间的差异,说明弹簧阻尼器与控制器是不等效的。

In the area of maglev train system research, the suspension controllers are substituted by spring-dampers for the sake of simplifieation in a lot of documents. However the validity of this method and the reliability of the results have not been further analyzed. This paper analyzes the essential difference between the spring-damper and controller through the mathematical model, discusses its influence on the system performance from three factors： stability, dynamic responding ctaracteristics and high frequency response. Based on the mid-test train of the National University of Defense Technology, a simulation is done to validate the difference between the springdamper and controller. In conclusion, the paper demonstrates the substitution is nonequivalent.