LQG-IMC集成的空气悬架车身俯仰姿态控制策略研究  

Research on Attitude Control Strategy of the Air Suspension Body Pitch Integrated by LQG-IMC

作　　者：袁春元[1] 王传晓 YUAN Chun-yuan;WANG Chuan-xiao(School of Mechanical Engineering,Jiangsu University of Science and Technology,Jiangsu Zhenjiang 212000,China)

机构地区：[1]江苏科技大学机械工程学院,江苏镇江212000

出　　处：《机械设计与制造》2024年第9期362-368,共7页Machinery Design & Manufacture

基　　金：江苏省研究生实践创新计划(SJCX20_1449);国家自然科学基金(51575249)。

摘　　要：为了提高空气悬架车辆在非紧急工况下的整车性能和车身姿态,建立了刚度可调空气悬架车辆半车纵向行驶动力学模型,结合LQG控制与IMC控制的优缺点,设计了空气悬架LQG-IMC集成控制器,并引入粒子群算法来优化了IMC时间常数。应用MATLAB/Simulink搭建了仿真模型,仿真了初始速度30m/s、B级路面和非紧急制动工况。结果表明,与被动悬架相比LQG-IMC集成控制空气悬架车辆的车身俯仰角、前悬架及后悬架的动挠度均方根分别改善了56.44%、53.33%和63.71%,且车身姿态得到进一步控制,为空气悬架控制器的开发奠定了理论基础。In order to improve the performance and body attitude of air suspension vehicles under non-emergency conditions,the half vehicle longitudinal driving dynamic model of air suspension vehicle with adjustable stiffness is established.Combined with the advantages and disadvantages of LQG control and IMC Control,the integrated controller of air suspension LQG-IMC is de⁃signed,and the time constant of IMC is optimized by particle swarm optimization.The simulation model is built by MATLAB/Simulink,and the initial speed 30m/s,B-level road and non-emergency braking conditions are simulated.The results show that the dynamic deflection root mean square of LQG-IMC integrated control air suspension vehicle body elevation,front suspension and rear suspension are improved 55.44%,53.33%and 63.71%respectively,and the vehicle body attitude is further controlled.It lays a theoretical foundation for the development of air suspension controller.

关 键 词：空气悬架 整车性能 车身姿态 LQG-IMC控制 

分 类 号：TH16[机械工程—机械制造及自动化] U461.6[机械工程—车辆工程]