Subspace Identification for Closed-Loop Systems With Unknown Deterministic Disturbances

被引：2
|
作者：
Li, Kuan [1 ]
Luo, Hao [2 ]
Jiang, Yuchen [2 ]
Tang, Dejia [1 ]
Yang, Hongyan [3 ]
机构：
[1] Shanghai Aerosp Control Technol Inst, Shanghai 201109, Peoples R China
[2] Harbin Inst Technol, Sch Astronaut, Control & Simulat Ctr, Harbin 150006, Peoples R China
[3] Beijing Univ Technol, Fac Informat Technol, Engn Res Ctr Digital Community, Minist Educ, Beijing 100124, Peoples R China
来源：
IEEE-CAA JOURNAL OF AUTOMATICA SINICA | 2023年 / 10卷 / 12期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Bernstein polyaomial; closed-loop system; subspace identification; unknown deterministic disturbances; MODEL IDENTIFICATION;
D O I：
10.1109/JAS.2023.123330
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 paper presents a subspace identification method for closed-loop systems with unknown deterministic disturbances. To deal with the unknown deterministic disturbances, two strategies are implemented to construct the row space that can be used to approximately represent the unknown deterministic disturbances using the trigonometric functions or Bernstein polynomials depending on whether the disturbance frequencies are known. For closed-loop identification, CCF-N4SID is extended to the case with unknown deterministic disturbances using the oblique projection. In addition, a proper Bernstein polynomial order can be determined using the Akaike information criterion (AIC) or the Bayesian information criterion (BIC). Numerical simulation results demonstrate the effectiveness of the proposed identification method for both periodic and aperiodic deterministic disturbances.
引用
收藏
页码：2248 / 2257
页数：10
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