摘要
为了提高液压系统中流量和压力的控制精度,消除流量、压力的相互干扰影响,提出了流量和压力闭环PID控制策略。将测量值与设定值的差值输入PID控制器,调节PID控制器输出控制电压值来整定系统实际流量和压力。通过改变交流伺服电机转速调整系统实际流量,改变磁粉制动器的加载力矩调整系统实际压力。实验结果表明:流量和压力闭环控制策略控制效果好,抗扰动能力强。
In order to improve the control preeision and eliminate the mutual interferenee effect of flow and pressure in the hydraulic system, the closed-loop PID control strategy of flow and pressure was proposed. The difference between the measured value and the set value was inputted PID controller, and the system actual flow and pressure was adjusted by the voltage outputted value of PID controller. The actual flow of the system was adjusted by changing the speed of the AC servo motor. The actual pressure of the system was adjusted by changing the load torque of the magnetic particle brake. The experimental results show that the closed-loop control strat- egy of flow and pressure has good control effect and strong anti disturbance ability.
出处
《机床与液压》
北大核心
2017年第7期23-25,69,共4页
Machine Tool & Hydraulics
基金
国家自然科学基金资助项目(51675399
51275375)
湖北省自然科学基金资助项目(2013CFB045)
湖北省教育厅科学技术研究重点资助项目(D20141802
D20151803)
湖北汽车工业学院博士科研基金资助项目(BK201403)
关键词
流量闭环
压力闭环
液压系统
Flow closed loop
Pressure closed loop
Hydraulic system
