基于横摆角速度的ABS整车控制方法的研究

ABS的控制策略一般都在单轮模型的基础上开发,显然这样的控制策略不能很好的满足汽车制动过程中的方向稳定性。在ABS逻辑门限控制策略的基础上给出了一种基于横摆角速度的ABS整车控制方法。结合14自由度的汽车动力学模型,利用数值仿真技术进行了ABS单轮控制策略、低选控制策略以及整车控制策略下汽车制动性能的分析,并从汽车制动效能以及方向稳定性等参数进行了各种控制策略的比较,结果表明控制方法不仅具有良好的制动效能,同时也有较好的方向稳定性。

Investigation to ABS Control Strategy for Vehicle Dynamics Based on Yaw Rate

Because the ABS control strategy was developed based on individual wheel model,it is obvious that the ABS control strategy has no the ability to keep the direction stability well in braking.A new ABS control strategy that uses yaw rate as the control parameter was developed based on the ABS logic threshold control.In conjunction with the 14 DOFs vehicle dynamic model,numerical simulations were conducted to analyze the braking efficiency under ABS individual wheel model,selecting lower value model and the present control strategy,respectively.Comparing with the parameters such as braking distance and direction stability,it is shown that the present control strategy satisfies not only the requirement of braking efficiency,but also the direction stability.