基于边界层模糊调节的液压系统准滑模变结构控制  

Quasi-Sliding Mode Variable Structure Control Based on Fuzzy Scheduling Boundary with Application to a Hydraulic Positioning System

作　　者：杨勇[1] 罗安[2] 覃爱娜[3] 

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410076 [2]湖南大学电气与信息工程学院,湖南长沙410082 [3]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《湖南大学学报（自然科学版）》2006年第3期67-70,共4页Journal of Hunan University:Natural Sciences

基　　金：教育部高校博士点专项科研基金资助项目(20030533014);湖南省自然科学基金资助项目(04JJ6033)

摘　　要：提出一种基于边界层模糊调节的准滑模变结构控制方法.基于滑模开关函数及其变化量,设计一个二维边界层模糊调节器,根据滑模开关平面状态的变化动态调整滑模边界层的宽度.应用于液压位置系统的控制实验结果表明,所提出的控制方法能保证液压系统响应速度,提高控制精度,削弱抖振,较好地协调了变结构控制鲁棒性与平滑控制抖振之间的矛盾.A quasi-sliding mode variable structure control （QSMVSC） based on fuzzy scheduling boundary was developed and applied to the positioning control of a hydraulic servo system. A two-dimension fuzzy scheduling mechanism was designed. The boundary width of sliding mode plane was dynamically tuned due to the sliding mode plane function and its change rate. Experiment results applied to the hydraulic positioning system showed that fast response, higher precision, and chattering reduction could be carried out by using the proposed QSMVSC based on fuzzy scheduling boundary, as well as the conflict between the robustness and control smoothing in the hydraulic positioning system were balanced.

关 键 词：准滑模变结构控制 边界层 模糊调节 抖振削弱 稳态性能 液压位置系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]