A space kinematics equation of the front wheel’s steering rod mechanism was built through the steering rod mechanism of the rhombic vehicle that was symmetrical about front and rear.The virtual prototyping model was built by utilizing the dynamics analytical software ADAMS of mechanical system.It validated the kinematics equations’ correctness.Considering the length and initial location of the wheel links, the relation of steering angles when the wheel turned left and right was optimized as well as the variation of steering angle during the wheel bounded based on the genetic algorithm.According to the requirements of the rhombic vehicle,the length and initial location of the corresponding links were optimized,which provides a theoretic basis to the design of steering mechanism.

根据菱形车转向系统转向拉杆机构前后对称的特点,为前轮转向拉杆机构建立了空间运动学方程。在ADAMS软件中建立虚拟样机模型,验证了运动学方程的正确性。运用遗传算法,以各连杆的长度和初始位置为参数,对车轮向左转和向右转的转角关系以及车轮跳动过程中的转角变化进行了优化。根据菱形车的结构要求优化出了相应的各连杆的长度和初始位置,为菱形车的转向机构设计提供了理论基础。

菱形车, 转向拉杆机构, 优化分析, 遗传算法