电动汽车转向机构的优化设计

The Optimization Design of Electric Automobile Steering Mechanism

根据某电动汽车齿轮齿条式转向系统的实际结构,推导了该转向机构的运动学方程。以方向机在汽车纵向上的安装位置为变量,跟踪Ackerman转角为目标,并考虑转向力传递效率,对该转向机构进行了优化设计。优化后,前轮实际转向角度非常接近Ackerman转角。并在ADAMS中建立了虚拟样机对优化结果进行了验证。验证结果表明,优化是有效、可靠的。

According to the actual structure of a electric automobile rack and pinion steering system,kinematic equation of the steering mechanism is deduced.By applying the mounting location of traversing mechanism at the automobile longitude as a variable,the ideal Ackerman angle and considering the transmission efficiency of steering force,the steering mechanism is optimized.The front wheel steering angle is close to the Ackerman angle after optimization and the optimized result verification by building virtual prototype in ADAMS is carried out.The result shows that the optimization is effective and reliable.