| 1. | Because the different stiffness match of front and rear suspension is very influencing to the ride comfort , optimal model of ride comfort is developed , regarding the rms of driver ’ s acceleration as the objection , regarding the stiffness of front and back suspension as optimal variable , regarding quiet flexibility 、 dynamic flexibility 、 frequency and dynamic load as nonlinear constraints . by matlab program and using sqp , the optimal match of front and back suspension ’ s stiffness is achieved , this optimal model consider not only request of quiet 、 dynamic flexibility 、 frequency and damp , but also security of run and peace of road , it is closer to the fact than other models which only consider partial restriction
由于前后悬架垂直刚度的不同匹配对汽车行驶平顺性影响较大,论文建立以驾驶员垂直加速度的均方根值作为汽车行驶平顺性优化目标值、以前后悬架垂直刚度作为优化变量的优化设计模型,并辅以静挠度、动挠度、频率、动载荷等非线性约束,使用序列二次规划法,利用matlab编制优化程序,求得前后悬架垂直刚度的最优匹配值;此优化模型不仅包含动静挠度及频率和阻尼的限制,还考虑到汽车的行驶安全性和道路友好性,比文献报道的只考虑部分约束的优化模型更切合实际情况。 |
