摘要
针对悬架系统阻尼比设计受车辆行驶安全性、人体乘坐舒适性及减振器非线性阻尼特性影响的问题,为使车辆具有良好的行驶平顺性,根据1/2车辆行驶振动模型,利用MAⅡAB/Simulink,建立了基于减振器分段线性特性的车辆悬架系统阻尼比优化设计仿真模型;根据车身垂直振动加速度、俯仰振动角加速度和车轮动载均方根值,利用线性加权和法,建立了悬架系统阻尼比优化设计数学模型。在此基础上,以路面不平度作为输入激励,以悬架动挠度和性能指标加权因子为约束条件,创建了车辆悬架系统阻尼比优化设计方法。通过计算机仿真对悬架系统阻尼比进行了优化设计和分析,可知阻尼比的优化设计值能够有效提高车辆的行驶平顺性,为车辆悬架系统阻尼比设计提供了有益参考。
In order to realize good ride comfort of vehicle,according to the 1/2 vehicle vibration model and using MATLAB/Simulink,an optimal design simulation model for damping ratio of vehicle suspension was established based on piecewise linear characteristic of shock absorber.According to the root mean square values of vertical vibration acceleration of vehicle body,the pitch angle vibration acceleration and the tyre dynamic load,using the linear weighted sum method,an optimal design mathematical model for damping ratio of vehicle suspension was built.Based on this,using road roughness as input,suspension dynamic deflection and the performance index weighting factor as constraint conditions,an optimization design method for damping ratio of vehicle suspension was presented based on piecewise linear characteristic of shock absorber.Through computer simulation,the optimal damping ratio of suspension was designed and analyzed.The results show that the damping ratio value designed can significantly improve the riding comfort of vehicle.This research provides a reference for the design of suspension damping ratio of vehicle.
出处
《计算机仿真》
北大核心
2017年第3期128-132,242,共6页
Computer Simulation
基金
国家自然科学基金(51575325)
山东省自然科学基金(ZR2013EEM007)
山东省重点研发计划项目(2015GGX105006)
关键词
车辆
悬架系统
减振器分段线性特性
阻尼比优化
Vehicle
Suspension system
Shock absorber piecewise linear characteristic
Optimal damping ratio
