永磁电磁型低速磁悬浮车轨耦合振动抑制新方法

New method to suppress tracks coupling vibration in PEMS low speed maglev train

针对永磁电磁混合磁浮列车静浮实验中遇到的车轨耦合振动问题,首先建立考虑轨道弹性的系统数学模型,分析产生振动的原因,提出了通过设置非线性饱和环节、动态调整饱和阈值来抑制车轨耦合振动的新方法。系统在平衡点附近时通过调整饱和阈值来改变控制输出的幅值特性,逐步消除引起共振的能量,从而达到抑制振动的目的,系统在偏离平衡点时,快速释放饱和环节,进而提升控制器的调节能力和抗干扰能力。

Tracks coupling vibration in PEMS may occur in static suspension test .In this paper ,the model of PEMS consider‐ing elastic track is established firstly ,and the causes of tracks coupling vibration are analyzed in detail .A new method of sup‐pressing tracks coupling vibration is put forward by setting up nonlinear saturation and adjusting the saturation threshold dy‐namically .The nonlinear saturation with adjustable threshold is applied to vary the output amplitude characteristic near the e‐quilibrium point of the system ,and the energy that causes resonance is gradually eliminated to achieve the purpose of restrai‐ning tracks coupling vibration .When the system deviates from the equilibrium point ,the saturation is quickly released to avoid the impact for the regulating ability and anti‐interference ability of the controller .