Reduced order disturbance observer for discrete-time linear Systems

被引：116

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

来源：

AUTOMATICA | 2013年 / 49卷 / 04期

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

页码：968 / 975

页数：8

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