Author(s): ZHANG Xiao-liang, YU Ying, GONG Chen-jun
Pages: 48-51
Year: 2015 Issue:  3
Journal: Hydraulics Pneumatics & Seals
Keyword:  assembled semi-trailer; suspension performance; valve control cylinder; PID control;
Abstract: For the research of assembled semi-trailer hydraulic suspension’s performance on a special conditions, a 1/4 vehicle dynamic model was developed. In the same time, Based on the a mathematic relationship between the force that the cylinder produced and the current which control the displacement of the spool, a PID controller for controlling the position of the cylinder was designed to meet the needs of stability when the semi-trailer travels on the slope road. The simulation model was built also by means of the software Matlab/simulink. The result indicated that the hydraulic suspension can ensure the levelness of its loading platform by adjusting its position when the semi-trailer travels on the slope road.