基于相似接近度的悬架参数多目标模糊优化

Multi-Objective Fuzzy Optimization Design of Passive Suspension System Based on Similar Approach Degree

综合考虑车辆的乘坐舒适性和对路面的损坏性,以汽车座椅和悬架系统的阻尼与刚度作为设计变量,以座椅加速度均方根值和轮胎相对动载荷均方根值为目标函数,建立了被动悬架参数的两目标优化设计模型。应用模糊理论,结合海明距离、模糊贴近度和灰色关联度3项指标,构造了一个"相似接近度"的模糊评价函数。对实际算例进行了两目标模糊优化设计,验证了该方法的有效性。

Taking the damping and stiffness of automobile seat and suspension system as design variables,the root mean square value of the acceleration of seat and relative dynamic load of tire as objective function,two optimization design models of passive suspension parameters considering riding comfort and pavement breakage are presented in this paper.A “similar approach degree”fuzzy evaluation function is put forward according to three norms of hamming distance, fuzzy nearness and the grey relational degree.The actual design model is founded based on optimum design is finished.The results show that the method is effective and feasible.