基于Matlab的汽车制动力分配比优化设计  

Automobile braking force distribution ratio optimization design based on Matlab

作　　者：谢欣然[1] 

机构地区：[1]成都理工大学工程技术学院,四川乐山614000

出　　处：《现代机械》2016年第1期10-13,共4页Modern Machinery

摘　　要：对某中型两轴货车进行制动时的受力分析,建立计算两轴汽车前后轴制动利用附着系数φ_rφ_f的数学模型。以φ_rφ_f曲线与φ=z直线最接近为优化目标建立多目标优化评价函数,以ECE法规为约束条件,以制动力分配比β为设计变量。运用Matlab优化工具箱进行解算,求出最优点β;运用Matlab计算并输出优化后的φ_rφ_f曲线与φ=z直线图;β曲线与I曲线图;运用Matlab对制动距离仿真计算,得出采用最优点β的汽车制动性能更好。该优化设计方法对汽车的制动系统设计有一定的指导作用。Through analyzing the braking force of two axis medium van,a mathematical model using attachment coefficient φ_rφ_f is set up. In order to make φ_rφ_f curve come closest to φ= z linear,a multi- objective optimization evaluation function is established with ECE regulations as the constraint conditions,and braking force distribution ratio β as the design variable.The optimal point β is worked out employing the Matlab optimization toolbox. Optimized φ_rφ_f curve,φ = z linear graph,βcurve,and I curve graph are worked out using Matlab. The result shows that,the automobile with optimal β worked out by means of Matlab simulation to calculate the braking distance has better braking efficiency. The optimization method can provide some reference for future design of automobile braking system.

关 键 词：制动强度 利用附着系数 制动力分配比 优化设计 MATLAB优化工具箱 

分 类 号：TH22[机械工程—机械制造及自动化]