Linear Quadratic Optimal Control Theory Applied to the Damping System of the Bus Based on Electrorheological Fluid
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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 kV/mm、能耗约为225 W,为配套电源的设计提供了依据。
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