Research on Attitude Control Strategy of the Air Suspension Body Pitch Integrated by LQG-IMC
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.
Air SuspensionVehicle PerformanceBody PostureLQG-IMC Control
万方数据
维普
