随机干扰下横向互联空气悬架车身高度控制  

Body height control of vehicles with laterally interconnected air suspension system under pavement disturbance

作　　者：江洪[1] 周扬扬[1] 王玉杰[1] 李美[2] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]海南大学机电工程学院,海南海口570228

出　　处：《江苏大学学报（自然科学版）》2017年第4期383-388,395,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51575241);国家青年科学基金资助项目(51305111)

摘　　要：以横向互联空气悬架车辆为研究对象,设计了与横向互联气路相协调的车身高度调节系统,建立了随机干扰下车身高度调节数学模型.基于传统高度控制目标设计模糊控制器,通过搭建试验台架验证其在干扰下的实际效果.考虑到若将随机激励下测量所得的带噪的高度信号直接作为控制输入将对系统判断造成干扰,提出了以目标高度对应空气弹簧内气体质量作为控制目标,并对先前模糊控制器输入及控制规则进行修改.在此基础上,为保证车高调节过程中车身姿态的稳定,制定了"追逐式"高度调节策略,并在Matlab/Simulink中搭建模型进行仿真分析.结果表明:该控制目标及策略在随机路面干扰下能快速调节车身高度至目标高度,相比于车身高度未调节时,切换过程中簧上质量加速度均方根值无恶化迹象,保留了车辆悬架的减振性能,能有效保证车高调节过程中车身姿态的稳定性.Taking the laterally interconnected air suspension as research object, the height adjustment system in accordance with laterally interconnected air suspension was designed, and the mathematic model under pavement disturbance was built. The height adjustment fuzzy control was designed based on the traditional height control target, and the result was verified by the bench test. Because the measured height signal with noise interference under pavement disturbance as the input could disturb system to judge, the air mass corresponding to air spring target height was determined as control objective, and the pervious fuzzy controller input and control rules were modified. The stepwise height strategy was adopted to prevent instability phenomenon during height adjustment process, and the actual control performance was verified by simulation in Matlab/Simulink. The simulation results show that the control strategy can adjust body height quickly under the incentive disturbance while the root mean square of sprung mass acceleration has no deterioration during height adjusting comparing to initial height. The suspension damping performance is retained to well keep the body posture stable.

关 键 词：空气悬架 横向互联 高度调节 追逐式姿态控制 乘坐舒适性 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置] U463.33[自动化与计算机技术—控制科学与工程]