交叉变轮距车辆磁流变悬架系统的优化设计  

Optimization design of MR suspension system based on variable cross track vehicle

作　　者：孟广耀[1] 孔光[1] 王作娟[1] 黄居鑫[1] 李忠政 MENG Guangyao , KONG Guang , WANG Zuojuan , HUANG Juxin , LI Zhongzheng(School of Mechanical Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, Chin)

机构地区：[1]青岛理工大学机械工程学院,山东青岛266520

出　　处：《中国工程机械学报》2017年第5期415-420,共6页Chinese Journal of Construction Machinery

摘　　要：基于不同农作物种植行距不同以及生长高度不同而设计的高地隙交叉变轮距车辆底盘,对其悬架系统的设计与优化开展研究.首先,建立了磁流变阻尼器阻尼可控悬架系统的Bouc-wen 2自由度动力学模型,并分析了悬架系统对路面不平度输入的振动响应,得到了基于车辆平安性和悬架动挠度对路面不平度输入的振动响应均方值表达式;其次,以车身质量和路面激励为负载对刚性车架体进行疲劳分析,设计了柔性车架体;最后,分析了车身阻尼比、车身质量与车轮质量比、车轮刚度与悬架刚度比对车辆平安性的影响,确定了悬架系统的最优设计参数.在此基础上,建立磁流变阻尼器悬架系统PID模糊控制策略,通过仿真分析验证了参数设计的合理性和控制策略的有效性.A research on designing and optimization about the suspension system on the high clearance variable tread vehicle which considered the different crops planting spacing and living height is caught.Firstly,a two freedom dynamical Bouc-wen model of variable cross track vehicle with controllable damping semi-active suspension system based on MR damper is established and the mean square value expression of vibration response is obtained based on vehicle safe,vehicle comfort and suspension dynamical deflection of road roughness by analyzing vibration response.Secondly,the flexible frame body was designed by making an fatigued analysis on rigid frame by applying load of vehicle body mass and excitation of road.Finally,the optimal design parameters of semi-active suspension system are determined by analyzing the influence of damping ratio,body and wheel mass ratio and wheel and suspension stiffness ratio on vehicle safety and a semi-active control strategy of MR damper suspension system is established.On this basis,a semi-active fuzzy control strategy for system was established,and the rationality of the parameter design and the effectiveness of the control strategy were verified by simulation analysis.

关 键 词：磁流变阻尼器 路面不平度 车辆平安性 PID模糊控制策略 

分 类 号：TH131.1[机械工程—机械制造及自动化] U463.33[机械工程—车辆工程]