基于功率键合图的轮式装载机工作装置液压系统的建模与仿真

Modeling and Simulation of Hydraulic System of the Wheel Loader Based on Power Bond Graph

基于ZL60轮式装载机工作装置液压系统的工作原理,采用功率键合图方法建立不同工况下工作装置液压系统的功率键合图。由所建立的功率键合图列写系统动态方程,根据系统动态方程建立在铲斗后倾工况下的Simulink仿真模型。设置液压系统的仿真参数,应用Matlab/Simulink软件,编制M函数文件进行仿真。得到液压系统的性能曲线,结果有利于产品的开发改进、性能评估和优化设计。

Based on the working principle of the hydraulic system for the working device of ZL60 wheel loader,the power bond graph of its hydraulic system was established by using the power bond graph method under the different working conditions.The power dynamic equations of the system was written out according to the established power bond graph and the Simulink simulation model was established under the bucket backward operating condition based on the power dynamic equations of the system.This simulation was carried out by setting the simulation parameters of the hydraulic system,applying the Matlab/Simulink software and compiling the M function file,the performance curve of the hydraulic system was obtained,which is great helpful for the product development,the per-formance evaluation and the optimum design.