考虑轮胎侧偏刚度的汽车转向理想线研究

建立了前、后驱汽车低速转向时的受力模型,用解析法列出其方程并求解,同时得到了受力模型中各力的影响因素和变化趋势;分析了刚性轮胎和弹性轮胎在侧偏力作用下的侧偏现象;定义了汽车转向前点和汽车转向理想线,提出了一种求取转向理想线的方法,分别用给定预偏角和侧偏角以及侧偏后前点距后轴距离两种的关系来判断此方法的正确性,结果证明此方法能很好地求得转向理想线;修正了考虑侧偏刚度后的阿克曼转向原理并分析了修正阿克曼转向原理的影响因素。

Research on Automobile Steering Ideal Line Based on Tire Lateral Stiffness

A force model of front-drive and rear wheel-drive at low speed steering is established and method of listing the equation is solved analytically,the influence factors and change trend on the force model are obtained;analysis of rigid and elastic tire in tire cornering force under the action of lateral phenomenon;the definition of former point and the steeringideal-line,put forward a method for getting to the steering-ideal-line,with the given bias angle and sideslip angle and lateral distance of two points before the rear axle relationship to determine the validity of this method,the results show that this method can well achieve to the ideal fixed line;considering the cornering stiffness after the Ackerman principle and analyzes the influence factors of the modified Ackermn steering principle.