考虑间隙影响的汽车转向机构稳健优化设计

应用具有正态分布的设计参数与噪声因素的稳健设计理论，对汽车转向机构进行了稳健优化设计。以转向过程中转向机构14个位置的运动误差为目标函数，以主销中心距、轴距、转向梯形底角和转向梯形臂长度为设计变量，以各运动副间隙为噪声因素，以最小传动角及最大转角误差等为约束条件，建立了含间隙影响的转向机构稳健优化数学模型。设计结果表明，在运动副存在间隙或间隙变化时，此设计方法能有效保证转向机构的运动精度。

Robust Optimization on Steering Mechanism of Truck with Clearances

By adopting a theoretical method of robust optimization design with design parameters ano noise factors of normal distribution, a steering mechanism of truck is designed. A math model with clearances based on robust optimization is established. The movement precision in fourteen positions of steering mechanism during steering course is chosen as objective function, and kingpins distance, axle-base, the bottom angle of trapezoid mechanism and the length of steering arm are chosen as design variables, and clearances in locomotion joints are chosen as noise factors, and minimum transmission angle and maximum steering angle error are chosen as restraint conditions, etc. Optimum results showed that the kinematics precision of steering mechanism is assured even if there are clearances in locomotion joints.