关键词: 磁流变效应；半主动悬架；模糊 PID 控制；阻尼器；Matlab/Simulink

Abstract: In order to improve the ride comfort of commercial vehicles, this study combined with a commercial truck semi-active suspension system design research. Firstly, the structure of the magneto-rheological (MR) damper is designed, and the structure is optimized with Ansoft finite element analysis software to avoid the under-saturation and over-saturation of the magnetic field strength of the MR damper. Secondly, fuzzy control and proportional integral derivative (PID) control are used to track the damping force of the damper, so that the damping force is always close to the best comfort and safety. Finally, the damping performance of the damper is simulated based on Matlab/Simulink numerical analysis software, and a semi-active suspension system based on MR damper is designed. The MR damper designed in this study has a compact structure and is easy to be integrated. The final simulation results show that compared with the traditional passive suspension, the semi-active suspension has better vibration reduction effect and faster response speed, which makes the vehicle have better ride comfort and driving safety.

Key words: Magneto-rheological effect; Semi-active suspension; Fuzzy PID control; Damper; Matlab/Simulink