摘要
随着阻尼可变半主动悬架应用日益广泛,不考虑阻尼变化因素的传统车身高度控制策略已不能很好地满足控制要求。为此,提出适应阻尼变化的车身高度控制系统。在经试验验证的整车车身高度控制模型的基础上,离线计算车辆4悬架处阻尼系数不同组合情况下的最优车身高度控制参数,并建立离线专家系统。该系统以阻尼系数为输入,可以根据阻尼系数实时更改车身高度控制参数,保证在车身高度调节过程中车身高度控制参数始终处于最优值。仿真结果表明:适应阻尼变化的车身高度控制系统在调节过程中当阻尼系数发生变化时车身高度变化依旧连续平稳,与传统车身高度相比调节品质更高;在车辆行驶过程中,适应阻尼变化的车身高度控制系统调节时间短、超调量小且调节过程震荡更小。
With the increasing application of damping variable semi-active suspension,the traditional vehicle body height control strategy which is without consideration of damping factor can＇t meet the requirement of control. This paper proposes a vehicle height control system which takes the damping variation into consideration. On the base of vehicle height control model that verified by experiments,the optimal control parameters of vehicle body height control under different combinations of damping coefficient have been off-line calculated,and the offline expert system has been established. In this system,the parameters of the vehicle body control can be changed in real time according to the damping coefficient,which ensures that the parameters of the vehicle body control are always in the optimal values in the adjustment process. The simulation results show that the body height changes continuously and steadily under the control of the proposed system,and the body adjustment quality ishigher than traditional system. While the vehicle is driving,the proposed system has the advantages of short adjustment time,small overshoot and stable adjustment process.
作者
李仲兴
于文浩
LI Zhongxing;YU Wenhao(School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013 , China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2018年第4期1-9,共9页
Journal of Chongqing University of Technology：Natural Science
基金
国家自然科学基金资助项目(51575241)
关键词
车身
电控空气悬架
高度控制
阻尼
遗传算法
body
electrically controlled air suspension
height control
damping
genetic algorithm
