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采用轮毂电机的轻型汽车振动特性对比研究
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摘要
针对轻型汽车采用轮毂电机后簧下质量明显增加的特点,基于Matlab/SIMULINK建立七自由度整车模型并进行随机输入与脉冲输入仿真,以车身加速度均方根值、车轮相对动载荷均方根值和车身最大加速度以及车身俯仰角加速度和车身侧倾角加速度的均方根值为指标,对比汽车振动特性,分析轻型汽车采用轮毂电机对平顺性的影响。结果表明采用轮毂电机的轻型汽车在簧下质量增加一倍的情况下,随机输入下的车身加速度均方根值、车轮动载荷均方根值、车身俯仰角加速度均方根值在60km/h时比采用前分别变差1%、24.7%和14.4%。
For the characteristics of light vehicles that the unsprung mass increases significantly when using hub motors, the seven DOF full vehicle model was established based on Matlab/SIMULINK to carry out simulation on random input and pulse input. Taking rms of body acceleration, rms of wheel's relative dynamic load, maximum acceleration of body, rms of body pitch angle acceleration and rms of body roll angle acceleration as indicator. the automobile vibration characteristics was contrasted, and the impact of hub motors on ride comfort of light vehicle was analyzed. The results showed that in the case that unsprung mass of light vehicles doubled when using hub motors, After optimization, rms of body acceleration, rms of wheel's relative dynamic load and rms of body pitch angle acceleration deteriorated by 1%、24.7% and 14.4% respectively on random input at 60km/h.
引文
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