摘要
传统农用机械中的电控液压系统存在能耗高、电气化程度低和转向精度低等问题,故提出一种基于PID模糊控制器的闭环泵控系统,以提高电控液压系统的响应特性、控制精度和电气化程度。通过分析闭式液压泵控系统的工作原理搭建系统的数学模型,并在MATLAB软件中构建该系统的仿真模型,验证了该控制系统的动态特性。仿真结果表明:基于PID模糊控制器的闭式泵控系统具有良好的动态特性和控制精度;响应时间由原PID控制的1 s减为0.8 s,系统超调量由6.5 mm降为4.2 mm,系统稳定时间从3.8 s减为2.5 s。
Aimed at the problems of high energy consumption,low electrification and low steering accuracy of the electronically controlled hydraulic system of traditional agricultural machinery,a closed-loop pump control system based on PID fuzzy controller was proposed to improve the response characteristics,control accuracy and electrification degree of the electronically controlled hydraulic system.The working principle of the closed hydraulic pump control system was analyzed,the mathematical model was built,and the simulation model of the control system was built in the MATLAB to verify the dynamic characteristics of the control system.The results show that the closed hydraulic pump control system based on the PID fuzzy controller has good dynamic characteristics and control accuracy.The response time is reduced from 1 s to 0.8 s,the system overshoot is reduced from 6.5 mm to 4.2 mm,and the stabilization time required by the system is reduced from 3.8 s to 2.5 s.
作者
李冬
LI Dong(School of Mechanical and Electrical and Information Engineering,Wuxi Vocational Institute of Arts & Technology,Yixing Jiangsu 214206,China)
出处
《机床与液压》
北大核心
2020年第11期111-114,共4页
Machine Tool & Hydraulics
关键词
模糊控制
农用机械
液压系统
响应特性
Fuzzy control
Agricultural machinery
Hydraulic system
Response characteristics
