乘用车H臂悬架C特性的稳健性优化设计

Robust Optimization Design of H-arm Suspension Compliance Characteristics of Passenger Vehicle

针对某乘用车底盘调校过程中反复修改H臂悬架衬套参数所存在的调校周期长、性能改进不明显等问题,考虑到悬架安装误差,提出基于田口法的稳健性优化方案。首先建立悬架模型,根据K&C试验数据验证模型准确性;对衬套刚度进行灵敏度分析,筛选主要影响因素,确定目标函数,通过正交试验设计对H臂悬架C特性进行多目标稳健性优化。结果表明:优化后的悬架C特性及其稳健性均有明显改进,且缩短了调校周期。

Aiming at the problems of long tuning cycle and unapparent performance improvement in the chassis tuning process of keep changing H-Arm suspension bushing parameters,considering the error of suspension installation,the robust optimization based on Taguchi method was proposed. The H-arm suspension model was built and its accuracy was verified by K＆C test. The influence degree of bushing stiffness on suspension compliance characteristics was analyzed,the main influential factors were selected and the objective function of suspension compliance characteristics was confirmed. Orthogonal experiment was designed to make multi-objective robust optimization of H-arm suspension compliance characteristics. The optimization results illustrate that both the suspension compliance characteristics and robustness are improved a lot after optimization and the tuning time is shortened.