考虑机械阻尼结构的永磁悬浮系统动态特性研究

Study on Dynamic Characteristics of Permanent Magnet Suspension System Based on Mechanical Damping Structure

针对永磁悬浮结构的刚性解耦与振动抑制问题,以单自由度永磁悬浮系统为对象,研究弹簧阻尼结构对永磁悬浮系统的动态特性调节机理。将阻尼悬挂的动力学特性引入永磁斥力型悬浮模型中,分析表明弹簧阻尼悬挂并不能直接改善永磁悬浮结构的零阻尼特性。引入并联式混合悬浮结构,构建弹簧阻尼影响下的电磁永磁混合模型,并在电流/间隙双环反馈控制下,改善永磁悬浮结构的动、静态特性,结果表明:弹簧阻尼结构加剧了被控系统模型的复杂程度,但合理的弹簧有利于车辆减振与控制解耦,为进一步考量中小型悬浮架的机械解耦、车辆减振等设计,提供了理论基础和参考依据。

Aiming at the problem of rigid decoupling and vibration suppression of permanent magnetic suspension structure,based on the single-degree-of-freedom permanent magnetic suspension system the dynamic characteristics adjustment mechanism of spring damping structure on permanent magnetic suspension system was studied.Firstly,the dynamic characteristics of the damper suspension were introduced into the permanent magnet repulsive suspension model.The analysis shows that the spring damping suspension cannot directly improve the zero damping characteristics of the permanent magnet suspension structure.Secondly,the parallel hybrid suspension structure was introduced to construct the electromagnetic permanent magnet hybrid model under the influence of spring damping,to improve the static and dynamic characteristics of the permanent magnetic suspension structure under the current/gap double loop feedback control.The results show that the spring damping structure increases the complexity of the controlled system model,but reasonable spring damper can achieve the decoupling effect and vehicle damping.It provides theoretical basis and reference significance for further consideration of the mechanical decoupling and vehicle damping design of small and medium-sized suspension frames.