用汽车力学参数预测汽车稳态转向特性

Predicting steady state cornering characteristics of automobiles by using automobile mechanical parameters

汽车的稳态转向特性目前主要通过场地试验的方法获得，文章探讨采用汽车力学参数的测量结果预测汽车稳态转向特性的方法。根据影响汽车稳态转向特性的各项因素与不足转向度之间的内在关系，以在汽车力学参数试验台上实测的汽车力学参数数据为基础，采用曲线拟合方法，并加入汽车的轮胎特性，对被试车辆的不足转向度进行了预测。预测结果与试验场地实测结果的对比表明两者具有较好的吻合性。研究结果表明利用汽车的力学参数预测稳态转向特性具有不受环境影响。

Steady state cornering characteristics of automobiles are mostly gained by field tests. This paper developed a method which can predict steady state cornering characteristics by using test results of automobile mechanical parameters. According to the internal relation between the understeer degree and factors affecting steady state cornering characteristics of automobiles, based on both the automobile mechanical parameters measured on the facility for measuring mechanical parameters of automobiles and the tire properties, the understeer degree was predicted by means of curve fitting. A good accordance between the predicted results and the results of field tests was shown. The outcoming of the study proves that this method has some advantages of avoiding influence from environment and easy to identify the affecting factors.