Identification of processes in closed loop—identifiability and accuracy aspects
(1977) In Automatica 13(1). p.59-75- Abstract
- It is often necessary in practice to perform identification experiments on systems operating in closed loop. There has been some confusion about the possibilities of successful identification in such cases, evidently due to the fact that certain common methods then fail. A rapidly increasing literature on the problem is briefly surveyed in this paper, and an overview of a particular approach is given. It is shown that prediction error identification methods, applied in a direct fashion will given correct estimates in a number of feedback cases. Furthermore, the accuracy is not necessarily worse in the presence of feedback; in fact optimal inputs may very well require feedback terms. Some practical applications are also described.
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- author
- Gustavsson, Ivar ; Ljung, Lennart and Söderström, Torsten
- organization
- publishing date
- 1977
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Automatica
- volume
- 13
- issue
- 1
- pages
- 59 - 75
- publisher
- Pergamon Press Ltd.
- external identifiers
-
- scopus:0017360813
- ISSN
- 0005-1098
- DOI
- 10.1016/0005-1098(77)90009-7
- language
- English
- LU publication?
- no
- id
- 2be44ad1-1767-46eb-8018-99363f89f087
- date added to LUP
- 2018-12-09 17:43:33
- date last changed
- 2021-09-26 03:19:28
@article{2be44ad1-1767-46eb-8018-99363f89f087,
abstract = {{It is often necessary in practice to perform identification experiments on systems operating in closed loop. There has been some confusion about the possibilities of successful identification in such cases, evidently due to the fact that certain common methods then fail. A rapidly increasing literature on the problem is briefly surveyed in this paper, and an overview of a particular approach is given. It is shown that prediction error identification methods, applied in a direct fashion will given correct estimates in a number of feedback cases. Furthermore, the accuracy is not necessarily worse in the presence of feedback; in fact optimal inputs may very well require feedback terms. Some practical applications are also described.}},
author = {{Gustavsson, Ivar and Ljung, Lennart and Söderström, Torsten}},
issn = {{0005-1098}},
language = {{eng}},
number = {{1}},
pages = {{59--75}},
publisher = {{Pergamon Press Ltd.}},
series = {{Automatica}},
title = {{Identification of processes in closed loop—identifiability and accuracy aspects}},
url = {{http://dx.doi.org/10.1016/0005-1098(77)90009-7}},
doi = {{10.1016/0005-1098(77)90009-7}},
volume = {{13}},
year = {{1977}},
}