【摘要】 针对变转速泵控液压系统在负载快速多变工况下,由于负载变化时流量和压力的强耦合特性,控制流量具有不确定、时变和高度非线性问题,导致其低速稳定性差、响应速度慢、调速精度低等技术难题的出现,采用简单PID线性控制器往往不能得到满意的控制效果。本文提出采用模糊控制实现典型工况下变转速液压动力源输出流量的伺服控制策略,MATLAB仿真及相应实验结果均表明:本文提出的模糊控制策略具有良好的实际控制效果,控制精度高,并且具有优于传统PID控制的鲁棒性。更多还原

【Abstract】 For variable speed pump controlled hydraulic systems in rapidly changing load conditions,due to the strong coupling characteristic of flow and pressure when the load changes,the flow controlling is uncertain,timevarying and highly nonlinear,resulting in the appearance of poor low-speed stability,slow response and low speed precision,using the traditional PID control method is not conducive to achieve good control effect.This paper proposes the use of fuzzy control to achieve the servo control of output flow of variable speed hydraulic power source in typical conditions,MATLAB simulation and experimental results show that fuzzy control has good actual control effects,it has a high accuracy and its robustness is superior to the conventional PID control.更多还原