Coupled simulation study on working device of loader based on VL Motion

CHEN Guo-jin， JIN Shao-xun， CHEN Hui-peng
（College of Mechanical Engineering， Hangzhou Dianzi University， Hangzhou 310018， China）

Abstract： Aiming at improving the working device's performance defects of displacement tracking，the low response speed，a multi-body dynamic model of the loader's working device was created by building its three-dimensional model with Catia embedded in the VL Motion，defining its bodies，the joints and the corresponding driving interface of coupled simulation. According to the analysis of the hydraulic system of the working device，the electro-hydraulic system with the interface of VL Motion was built-in AMEsim. And the coupled simulation was performed by exchanging the variable's data through the interface in the plane of VL Motion and AMEsim. The classical control strategy of PID closed loop control was taken to optimize the defects. The simulation results indicate that with the coupled simulation plant，the working device's comprehensive properties controlled by PID closed loop have been improved greatly，its response speed becomes faster and tracking displacement error is less than 2%.
Key words： loader's working device； coupled simulation； virtual lab（VL） Motion； AMEsim