Reduced order disturbance observer for discrete-time linear Systems

被引:117
作者
Kim, Kyung-Soo [1 ]
Rew, Keun-Ho [2 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Taejon 305701, South Korea
[2] Hoseo Univ, Dept Robot Engn, Asan 336795, Chungnam, South Korea
基金
新加坡国家研究基金会;
关键词
Disturbance observer; Discrete-time system; Linear systems; Unknown inputs; NONLINEAR-SYSTEMS; INPUT ESTIMATION; STORAGE-SYSTEMS; OUTPUT-FEEDBACK; FAULT-DETECTION; STATE; DESIGN; COMPENSATION; ECCENTRICITY; PERFORMANCE;
D O I
10.1016/j.automatica.2013.01.014
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In the paper, an output-based disturbance observer of reduced order is presented for a class of discrete-time linear systems. First, a general form of a disturbance observer is proposed when full states are available. Then, by combining a state function estimator of minimal order, an output-based disturbance observer is derived. The existence condition will be formulated in the form of a static output feedback. Through examples, the effectiveness and advantages of the proposed approach will be demonstrated. A servo control problem in practice is addressed to show the validity of the approach. Furthermore, it will be shown that the proposed approach does provide a smaller order of disturbance observer than that of conventional approaches, while maintaining satisfactory performances. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:968 / 975
页数:8
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