Disturbance rejection in nonlinear systems based on equivalent-input-disturbance approach

被引:73
作者
Gao, Fang [1 ]
Wu, Min [2 ]
She, Jinhua [2 ,3 ]
Cao, Weihua [2 ]
机构
[1] Cent S Univ, Sch Informat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] China Univ Geosci, Sch Automat, Wuhan 430074, Hubei, Peoples R China
[3] Tokyo Univ Technol, Sch Engn, Hachioji, Tokyo 1920982, Japan
基金
中国国家自然科学基金; 日本学术振兴会;
关键词
Equivalent input disturbance (EID); Linear matrix inequality (LMI); Nonlinear system; State observer; Uniformly ultimately bounded; H-INFINITY-CONTROL; ROBUST STABILIZATION; OUTPUT-FEEDBACK; TRACKING; SUPPRESSION;
D O I
10.1016/j.amc.2016.02.014
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
This paper presents a new system configuration and a design method that improves disturbance rejection performance for a nonlinear system. The equivalent-input-disturbance ( EID) approach is used to construct an EID estimator that estimates the influence of exogenous disturbances and nonlinearities on the output of the system. Sufficient stability conditions for state-and output-feedback control are derived in terms of linear matrix inequalities. New EID-based control laws that combines an EID estimate with a state-or an output-feedback control laws ensure good control performance. A numerical example illustrates the design method. A comparison between the EID-based control, the conventional disturbance observer, the disturbance-observer-based-control, and the sliding mode control methods demonstrates the validity and superiority of the EID-based control method. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码:244 / 253
页数:10
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