【摘要】 在减振器中采用电流变液,通过控制电场实时响应路面激励,提高客车对振动响应的智能性。基于车辆1/4动力学模型的分析表明,在0~25 Hz路面激励下,车身加速度、相对动载、悬架动挠度的共振响应峰值分别减小52.9%、52.6%、60.0%。线性二次型最优控制理论的仿真结果表明,主动悬架系统的车身振动加速度减小0.37 m/s2,悬架动挠度值减小4.3 mm,轮胎变形量基本不变(仅约0.1 mm),实现了良好的减振性能,从而提高了行驶平顺性、被动悬架系统稳定性。不同路面状况下所需的场强幅值为3.5 k V/mm、能耗约为225 W,为配套电源的设计提供了依据。更多还原

【Abstract】 A damper based on electrorheological fluid could be controlled to make a response to the road excitation in real time by controlling the electric field. The analysis of the dynamic model of a quarter of a vehicle shows that the acceleration of the bus, relative dynamic load and dynamic deflection of the suspension have resonance peak less than common suspension by 52.9%, 52.6% and 60.0%, even more under the road excitation of 0 Hz to 25 Hz. Furthermore, the simulation based on the linear quadratic optimal control theory demonstrates that the active suspension’s acceleration of the bus decreases by 0.37 m/s2, the dynamic deflection decreases by 4.3 mm and the deformation of the tire essentially is unchanged, compared with the passive suspension system. These results improve the riding comfort and keep the stability. Additionally, the electric field’s magnitude is 3.5 k V/mm and energy consumption is 225 W on different road, which provides the basis for the design of the supporting power supply.更多还原