基于磁流变阻尼器高速列车半主动座椅悬架控制方法对比研究

Research on semi-active seat suspension control of high-speed trains based on magnetorheological dampers

在建立了高速列车“座椅-车体-构架”三自由度模型系统基础,分别提出了基于磁流变阻尼器的MPC控制、天棚阻尼控制、模糊控制半主动控制策略,并进行仿真分析。研究结果表明:与被动控制相比,施加半主动控制后的座椅振动加速度均方根值均有所减小,其中采用天棚控制、模糊控制和MPC控制的座椅加速度均方根值分别减少了25.37%,17.67%和16.38%;从频域角度而言,三种控制方法都能降低座椅5 Hz频带内的振动幅值;虽然天棚阻尼控制对座椅5 Hz频带内的幅值降低最大,但同时会造成座椅5 Hz以上的振动幅值增加,而MPC和模糊控制方法对座椅5 Hz以上的振动幅值没有明显影响。

In this paper,based on the three-degree-of-freedom model system of"seat-body-frame"of high-speed train,semi-active control strategies based on magnetorheological dampers are proposed re⁃spectively,simulated and analyzed,such as MPC control,canopy damping control and fuzzy control.The results show that compared with the passive control,the root mean square(RMS)values of the seat vibration acceleration are reduced by using the semi-active control,in which the RMS values of the seat acceleration are reduced by 16.38%,25.37%,and 17.67%with the MPC control,canopy control,and fuzzy control,respectively.From the perspective of the frequency domain,the three con⁃trol methods are able to reduce the vibration amplitude of the seat in the 5 Hz frequency band.Al⁃though the canopy damping control reduces the amplitude of the seat in the 5 Hz frequency band the most,but at the same time it causes the vibration amplitude of the seat above 5 Hz to increase,while the MPC and fuzzy control methods do not have a significant effect on the vibration amplitude of the seat above 5 Hz.