On Arbitrary Fractional System Identification in Frequency Domain

被引：8
|
作者：
Li, Dazi [1 ]
Liu, Lang [1 ]
Song, Tianheng [1 ]
Shen, Dong [1 ]
机构：
[1] Beijing Univ Chem Technol, Inst Automat, Beijing 100029, Peoples R China
来源：
IFAC PAPERSONLINE | 2015年 / 48卷 / 28期
关键词：
arbitrary order; fractional system identification; frequency domain; Levenberg-Marquardt algorithm; ORDER SYSTEMS; CONTROLLERS;
D O I：
10.1016/j.ifacol.2015.12.332
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
An identification algorithm for arbitrary order fractional system is proposed with frequency domain information. According to the frequency domain characteristics of fractional differential operator, the parameters estimation of the arbitrary order fractional system is transformed into a nonlinear equations problem. The variable damping least square method is applied to solve this nonlinear problem. In order to improve the efficiency of the parameters identification, a method to reduce the number of unknown parameters is also investigated. Numerical results illustrate the effectiveness of the proposed approach. (C) 2015, IFAC (International Federation or Automatic Control) Hosting by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1421 / 1426
页数：6
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