负载敏感系统建模与仿真研究

针对负载敏感系统建模与计算机仿真问题,基于流量连续性方程和力平衡方程建立了负载敏感系统变量泵、负载敏感阀、高压卸荷阀和变量缸的动力学方程;并在此基础上得到了负载敏感系统低压卸荷、高压卸荷和负载敏感3种工况的稳态方程;最后用EASY5软件搭建了负载敏感系统模型、根据各工况稳态方程确定了各元件的取值范围、并进行了仿真验证。仿真结果表明:用以上步骤建立的负载敏感系统模型运行稳定,各元件参数匹配合理,可以准确模拟各工况特性。

Research on modeling and simulation of load-sensing system

In order to deal with modeling and simulation of load-sensing system, dynamic equations of variable pump, load-sensing valve, high-pressure relief valve and modulating cylinder of load sensing system is established based on flow continuum equation and force balance equation. Then, steady state equations corresponding to low-pressure relief, high-pressure relief and load-sensing conditions are deduced by dynamic ones. Finally, load sensing system is modeled and simulated through EASY5 software, whose parameters are identified using steady state equation of different conditions. Simulation results indicate that the load-sensing system model is stable and has a reasonable parameter set, which can simulate different conditions exactly.