基于附着系数曲线长度的路面识别仿真研究

Simulation Study of Road Identification Based on Length of Adhesion Coefficient Curve

要使汽车制动时能够充分利用路面的附着条件,需要对路面状态进行识别。以滑移率区间[0,0.1]上的附着系数曲线长度作为路面识别的参数指标,在Kiencke轮胎—路面模型的基础上给出了7种典型路面的识别区间,据此在制动时完成路面识别。使用单轮车辆模型,在跃变路面上进行了仿真试验,结果表明:该方法对单一路面的识别时间约0.025s,对跃变路面的识别时间约0.01s,对不同路面附着条件的利用明显改善,提高了路面识别的快速性、准确性和制动性能。

Identification of road state is essential in order to making best use of adhesion conditions of different roads for automobile brake. The length of the adhesion coefficient curve in the slip rate interval [0,0.1 ] was regarded as its parameter index, identification intervals of seven typical roads were given under the Kiencke tyre-road model to complete road identification for brake. It＇s shown from the simulation tests on variational road based on the single-wheel model that it takes 0.025 s and 0.01 s to identify above roads separately with this method. The method obviously improves the utilization of adhesion conditions of different roads, and enhances the rapidity, accuracy and braking ability of road identification.