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汽车转向盘输入下的瞬态响应特性是评价操纵稳定性的一项重要内容.针对某车型在实际开发过程中出现的角阶跃输入下瞬态响应反应时间滞后的问题,通过采用多体动力学方法,建立了刚柔耦合仿真模型,对比了多种因素对该车角阶跃输入下瞬态响应反应时间的灵敏度,最终决定采用改变轮胎的侧偏刚度和调整质心的方案.对改进后的样车进行道路试验,结果表明瞬态响应反应时间有较大改善.
The transient response under steering wheel input is an important part of the evaluation of steering stability.Aiming at the problem of the lag of response time of transient response under the input of angular step in a vehicle during actual development, Method, the rigid-flexible coupling simulation model is established, and the sensitivity of many factors to the response time of the transient response under step input of the vehicle corner is contrasted. Finally, the scheme of changing the lateral stiffness and adjusting the center of mass of the tire is adopted. Of the prototype vehicles for road testing, the results show that transient response to the reaction time has been greatly improved.