液压伺服系统自适应模糊变结构控制  

Adaptive Fuzzy Variable Structure Control for Hydraulic Servo System

作　　者：杨勇[1] 

机构地区：[1]广东技术师范学院机电学院

出　　处：《电子学报》2008年第1期86-89,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.50578018);湖南省自然科学基金(No.04JJ6033)

摘　　要：结合变结构控制、自适应控制和模糊技术等特点,提出一种自适应模糊变结构控制方法.首先,设计一个带积分开关平面函数的变结构控制器,并构造一个二维模糊边界层宽度调节器以削弱抖振.其次,基于Lyapunov稳定性理论,引入一自适应算法,自适应调节变结构控制参数.应用于液压伺服系统的控制实验结果表明,所提出的控制方法能削弱抖振,改善液压伺服系统稳态控制精度,具有较强的鲁棒自适应综合性能.Combining the merits of variable structure control（VSC）, adaptive control and fuzzy technique, an adaptive fuzzy variable structure control has been developed. A variable structure controller with integral switching plane function is designed, and a two-dimension fuzzy scheduling mechanism is designed for boundary layer width tuning to reduce chattering. Based on Lyapunov stability theory, an adaptive algorithm is used to adaptively tune the parameters of VSC. Experiment results applied to hydraulic servo system show that both chattering reduction and higher steady state precision can be effectively carded out by using the proposed control method. The proposed control system has stronger robustness and adaptation.

关 键 词：模糊变结构控制 边界层宽度调节 自适应控制 抖振削弱 稳态精度 液压伺服系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]