车用磁流变减振器动力性能实验分析

MRF阻尼器结构简单、体积小、能耗低、反应迅速且阻尼力可调范围广, 已经成为新型履带车辆半主动悬挂系统优先选择的方案。基于磁流变液体本构关系的Bingham模型,对影响车用磁流变减振器的阻尼力的各种因素进行了综合分析。对自行研制的双出杆剪切阀式磁流变减振器进行了实验研究,获得了不同振幅、频率、电流强度下的阻尼力变化曲线,从不同的侧面获得了MRF阻尼器的动力性能。结合Hrovat限界最优半主动控制算法和车辆悬挂系统振动的半主动控制策略,仿真分析了磁流变阻尼器对整车振动的控制效果,并与LQR控制结果作了比较。

Experiments and Analysis for the Dynamic Performance of Damper Using Magnetorheological Fluid in Vehicle

Magnetorhological dampers is an ideal component of semi-active vibration control in tracked armored vehicle suspension system with the advantages of simple structure, small volume, energy saving, rapid response and smooth damping. Based on Bingham model, the damping force of a MRF damper was analyzed. And all the factors that affect the damping force of a MRF damper is discussed in this paper. The dynamical characteristics of self-made shearing-valve mode damper are analyzed in detail through experiments on its dynamic parameters such as damping force, displacement, velocity, frequency and electric current, etc. Then, the simulation analysis of semi-active vibration control of tracked vehicle suspension system is presented by u-sing magnetorheological fluid dampers, which utilize the limited optimal Hrovat control algorithm as semi-active control strategies. The control result is compared with the result of LQR algorithm in the end.