一种电液伺服系统位置控制的模糊迭代控制策略  

A Fuzzy Iterative Control Strategy for Position Control of Electro-hydraulic Servo System

作　　者：张亮[1] 李芝炳 李超[3] ZHANG Liang;LI Zhibing;LI Chao(School of Electrical Engineering,Jilin Railway Technology College,Jilin Jilin 132200,China;China FAW Corporation,Changchun Jilin 130013,China;School of Materials Engineering,Shenyang University of Technology,Shenyang Liaoning 110159,China)

机构地区：[1]吉林铁道职业技术学院电气工程学院,吉林吉林132200 [2]中国第一汽车股份有限公司,吉林长春130013 [3]沈阳工业大学材料工程学院,辽宁沈阳110159

出　　处：《机床与液压》2021年第10期156-159,共4页Machine Tool & Hydraulics

基　　金：辽宁省科学技术计划项目(2016106236)。

摘　　要：控制电液伺服系统对期望位置进行准确的追踪,有利于提高工作安全性和工作效率。对此,提出了采用模糊迭代控制策略的电液伺服系统位置控制方法。通过分析电液伺服系统位置控制模型,得出液压伺服阀的动力学方程,计算液压缸中不同腔室内的压差值,求得活塞的动力学模型,获取液压缸对负载施加压力的动力学模型。利用T-S模型,采用If-Then规则,在模糊集合的基础上求得控制量方程。以位置误差为依据,构造参数因子的迭代控制率,以完成模糊迭代控制策略的设计。采用所提模糊迭代控制策略和干扰观测控制策略对阶跃和三角形期望位置进行追踪测试。测试结果显示:在对阶跃和三角形期望位置进行追踪时,所提方法比干扰观测控制策略在x方向上的最大追踪超调值分别减小了35.06%和39.45%,在y方向上的最大追踪超调值分别减小了32.55%和11.68%。所提方法具备较好的位置控制性能,可准确地追踪期望位置。By controlling the electro-hydraulic servo system to track the desired position accurately is conducive to improve the safety and efficiency of work. Therefore, a position control method of electro-hydraulic servo system based on fuzzy iterative control strategy was proposed.Through the analysis of the position control model of the electro-hydraulic servo system, the dynamic equation of the hydraulic servo valve was obtained, the pressure differences in different chambers of the hydraulic cylinder were calculated, the dynamic model of the piston was obtained, and the dynamic model of the pressure exerted by the hydraulic cylinder on the load was obtained. By using T-S model and If-Then rule, the control quantity equation was obtained on the basis of fuzzy set. Based on the position error, the iterative control rates of parameter factors were constructed to complete the design of the fuzzy iterative control strategy. The proposed fuzzy iterative control strategy and the disturbance observation control strategy were used to track the step and the triangle expected positions. The test results show that compared with the disturbance observation control strategy, the maximum tracking overshoot in the x direction of the proposed method is reduced by 35.06% and 39.45% respectively when tracking the step and the triangle expected positions, and the maximum tracking overshoot in the y direction is reduced by 32.55% and 11.68% respectively. The proposed method has better position control performance and can accurately track the desired position.

关 键 词：电液伺服系统 位置控制 模糊迭代控制策略 T-S模型 

分 类 号：U463[机械工程—车辆工程]