一类非线性系统的积分变结构模糊自适应跟踪控制  

Integral variable structure fuzzy adaptive tracking control for a class of nonlinear systems

作　　者：张天平[1] 梅建东[1] 沈启坤[1] 

机构地区：[1]扬州大学信息工程学院,江苏扬州225009

出　　处：《控制与决策》2005年第6期669-673,共5页Control and Decision

基　　金：国家自然科学基金项目(60074013);江苏省教育厅指导性项目(KK0310067);扬州大学信息科学学科群项目(ISG030606).

摘　　要：针对一类具有未知常数控制增益的不确定非线性系统,基于变结构控制原理,并利用具有非线性可调参数的模糊系统逼近等价控制,提出一种具有监督控制器的积分变结构模糊自适应跟踪控制策略.该策略通过监督控制器保证闭环系统所有信号有界.进一步,通过引入最优逼近误差的自适应补偿项来消除建模误差的影响.理论分析证明了跟踪误差能够收敛到零.仿真结果表明了该方法的有效性.An integral variable structure fuzzy adaptive tracking control strategy with supervisory controller for a class of uncertain nonlinear systems with unknown constant control gain is developed. The design is based on the principle of variable structure control. The fuzzy system with nonlinear adjustable parameters is used to approximate unknown equivalence control. With the help of a supervisory controller, the resulting closed-loop system is globally stable in the sense that all signals involved are uniformly bounded. Furthermore, the adaptive compensation term of the optimal approximation error is adopted to reduce the effect of modeling error. Simulation results show the effectiveness of the approach.

关 键 词：非线性系统 模糊控制 积分变结构控制 自适应控制 全局稳定性 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]