汽车侧翻预警及防侧翻控制

为了减少汽车侧翻事故,提出了一种基于模型的汽车侧翻预警算法以及在预警基础上的防侧翻控制算法.预警算法通过三自由度线性汽车侧翻模型计算将来一段时间内汽车横向载荷转移律的绝对值,由侧翻条件得到侧翻危险时间;控制算法根据预警时间来触发比例-微分控制器对汽车实施控制.结果表明,预警算法能够及时准确预测汽车侧翻危险,而控制方法可以更好地发挥制动器效能,防止汽车侧翻.

Rollover warning and anti-rollover control for automobiles

To avoid rollover accidents of automobiles,a model-based algorithm for rollover warning and a control strategy for rollover prevention were proposed.In the algorithm,the Time-To-Rollover was computed from a vehicle model of three degrees of freedom,including sway,yaw and roll motions,and the absolute value of the lateral Load-Transfer-Ratio was taken as the rollover index.The proportional-differential control based on TTR was implemented to trigger the brake actuator.The numerical simulations show that the algorithm is able to forecast the rollover risk properly and timely,and the control strategy can improve the effectiveness of brake actuator.As a result,the rollover warning and control will enhance the safety performance of automobiles.