基于有限转动张量的转向机构分析及多岛遗传算法优化  

Analysis and Multi-island Genetic Algorithm Optimization of the Steering Mechanism Based on Finite Rotational Tensor

作　　者：莫旭辉[1] 房拥军[1] 高伟钊[1] 欧晓波[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《机械科学与技术》2013年第1期6-10,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：湖南大学汽车车身先进设计制造国家重点实验室自主课题安全节能通畅个人概念车研发项目(61075002);教育部长江学者与创新团队发展计划项目(531105050037)资助

摘　　要：结合有限转动张量、敏度分析和多岛遗传算法,对三轴类菱形车转向机构进行优化设计。基于有限转动张量,建立三轴类菱形车转向机构的运动学数值理论模型,并对其相关硬点作敏度分析。以敏度分析得到的结果为优化变量,以三轴类菱形车的前后轮转向同步性表征值最小为优化目标,利用多岛遗传算法对其进行优化。优化后目标值从初始的7.789°降到了1.210°,降低了三轴类菱形车在转向时的轮胎磨损。Combining finite rotational tensor （FRT）, sensitivity analysis and multi-island genetic algorithm （MI- GA） , the paper aims at the design and optimization of the steering mechanism of a three-axle similar rhombic vehi- cle. Then it establishes its kinematics numerical model based on FRT, and made sensitivity analysis of its related hard points. With sensitivity analysis results as optimization variables, the minimum characterization value of the front and rear wheels＇ steering synchronization as optimization target, it uses the MIGA as the tool to optimize the target. After optimization, the target value drops from the initial 7. 789 °to 1. 210 °, thus tire wear is reduced. The optimization results show that the method can be used to design the steering mechanism of the vehicle.

关 键 词：有限转动张量 敏度分析 多岛遗传算法 前后轮转向同步性 

分 类 号：U461[机械工程—车辆工程]