Modeling and simulation of semi-active suspension based on Carsim

XV Ji-chan， NIU Li-min， LIU Chao， XV Yong-xing
（School of Mechanical Engineering， Anhui University of Technology， Ma'anshan 243002， China）

Abstract：Aiming at the difference of the semi-active suspension system on the structure and control strategy at present，in order to better study its rationality，a semi-active suspension system based on the whole vehicle modeling and simulation technology was proposed. According to the result of theoretical analysis of the tunable throttle damper，a tunable throttle damper model was built using the Matlab/Simulink，and combined with the vehicle multi-body dynamics model in the software Carsim，then a vehicle model with damping adjustable semi-active suspension was developed. A controller model was built in Simulink with certainty and uncertainty combined control strategy，and effective adjustable of the vehicle suspension damping was achieved. Through simulation analysis of the model and compared with the passive suspension system，the results validate the correctness of the model and the practicality of the control strategy，which can improve the performance of the vehicle suspension.
Key words：automobile ride； Carsim； damping-adjustable； semi-active suspension； modeling； simulation