New simple approach for enhanced rejection of unknown disturbances in LTI systems with input delay

被引：11
|
作者：
Torrico, Bismark C. [1 ]
de Almeida Filho, Magno P. [1 ]
Lima, Thiago A. [1 ]
Santos, Tito L. M. [2 ]
Nogueira, Fabricio G. [1 ]
机构：
[1] Univ Fed Ceara, Dept Elect Engn, BR-60455760 Fortaleza, Ceara, Brazil
[2] Univ Fed Bahia, Dept Elect & Comp Engn, BR-4210630 Salvador, BA, Brazil
来源：
ISA TRANSACTIONS | 2019年 / 94卷
关键词：
Input delay; Unknown disturbance; Smith predictor; Finite spectrum assignment; LTI systems; Robustness filter; FINITE SPECTRUM ASSIGNMENT; DEAD-TIME; SMITH PREDICTOR; COMPENSATION; SCHEME;
D O I：
10.1016/j.isatra.2019.04.005
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This work proposes the extension of the simplified filtered Smith predictor (SFSP) for state-space systems to improve rejection of matched and unmatched unknown disturbances in LTI systems with input delay. The proposed structure is simpler than others recently proposed in the literature and can be applied to continuous-time or discrete-time systems. Furthermore, it allows improving rejection of both matched and unmatched disturbances, while also enhancing noise attenuation and robustness characteristics. Finite spectrum assignment (FSA) based implementation is used in order to guarantee the internal stability of the proposed controller. Simulation and experimental results are used to show the usefulness of the proposal. (C) 2019 ISA. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：316 / 325
页数：10
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