在3种经典轮胎-路面数学模型的基础上,引入了一种“路面状态特征因子”的概念(它代表最佳滑移率前附着系数-滑移率曲线段下面的封闭面积),给出了7种典型路面的特征因子阈值及其区间,据此识别汽车当前行驶路面状态.基于8自由度汽车动力学模型,分别在单一路面和对接路面上进行制动模拟试验.结果表明该方法能较准确快速地识别路面状态.最后在自制的汽车防抱制动装置试验台上进行的制动试验进一步验证了方法的有效性和可行性.%On the basis of three classic tire-road mathematic models, a concept of 'road condition characterization factor' is introduced, which represents the closed area under the segment of adhesion coefficient-slip ratio curve before optimum slip ratio, and the characterization factor threshold values and their intervals for seven typical roads are given to identify the condition of current road the vehicle driving on. Based on an 8-DOF vehicle model, two braking tests are simulated on both a road with uniform adhesion coefficient and a joint road with different adhesion coefficients respectively. The results show that the approach introduced can identify road condition quickly and accurately. Finally the results of a braking test on a self-made ABS test-bench also verified the effectiveness and feasibility of the approach.
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