磁浮交通轨排耦合自激振动分析及自适应控制方法

Analysis and Adaptive Control of the Track Induced Self-excited Vibration for the Maglev Transport

本文针对中低速磁浮交通的轨排自激振动问题,首先建立了包括轨枕、导轨在内的多跨磁浮轨排动力学模型,通过理论方法分析轨排的模态振型、频率等关键参数.其次,建立了包含一体化电磁铁的悬浮模块的动力学模型,并与轨排模型结合建立轨排-悬浮模块耦合模型,分析了耦合系统失稳发生自激振动的原因.提出了一种带辨识器的自适应振动控制方法,能够实时辨识轨排的主要动力学参数,并由此产生自适应振动控制律.相比现有的轨排振动控制方法,该方法具有更好的稳定性和环境适应性.

Taking the track-induced self-excited vibration problem in the medium-low speed maglev transport as the object,the model of the multi-span track structure,which consists of sleepers and rails,is firstly established,and crucial parameters related to the mode shapes and mode frequencies are obtained through theoretical analysis.Secondly,the dynamic model of the levitation module which includes an integrated electromagnet is developed,and together with the track model,a track-levitation module coupled system is formed;the reason that leads to the instability of the coupled system is further investigated.Besides,an adaptive vibration control scheme with a state observer is proposed,which is capable of identifying the major dynamic parameters of the track,and producing adaptive vibration control laws accordingly.Compared with the existing vibration control methods,this method behaves better in stability and adaptability.