汽车侧向稳定性研究

The Investigation to vehicle lateral stability

汽车在横向加速度的作用下会产生侧倾现象,不仅影响乘座的舒服感还会对行车安全造成巨大威胁,基于此,该文对汽车的横向稳定性进行了研究。首先,文章介绍了汽车产生侧倾的原因,提出了汽车转向稳定条件;然后基于预测控制的思想,通过寻求汽车速度矢量与车体轨迹的关系,预测出汽车在未来某时刻的运动轨迹,并根据该运动轨迹预测出方向盘的转向角,通过确定临界转向角的大小,计算出汽车何时必须减速,以保证不发生侧倾现象。

Auto body is bound to produce the car＇s roll phenomenon under the action of lateral acceleration, which not only has bad effects on the sense of comfortable but also makes great threats to the safety. Based on this, the vehicle lateral stability were studied in this paper. Firstly, the reasons were described and the stability conditions of Automotive steering were proposed in this paper. Secondly, based on the predictive control theory, by seeking the relationship between the auto velocity vector and the vehicle trajectory, the car＇s driving track was being predicted in advance and the steering angle of steering wheel was subsequently being predicted. By determining the critical size of the steering angle, it can be calculated when the speed should being reduced for the sake of no phenomenon of car roll.