Identification of linear, multivariable systems operating under linear feedback control
(1974) In IEEE Transactions on Automatic Control 19(6). p.836-840- Abstract
- The possibility of estimating process parameters using input-output data collected when the system operates in closed loop is discussed in this paper. Concepts that are useful for a systematic treatment of the problem are introduced. The results refer to the case where the regulator is a linear feedback law or alternates between several such laws. It is shown that a straightforwardly applied identification scheme has the same identifiability properties as the more complex method in which the parameters of the closed-loop system are estimated first. It is also shown that it is always possible to achieve the same identifiability properties as for open-loop systems by shifting between different linear regulators. The required number of... (More)
- The possibility of estimating process parameters using input-output data collected when the system operates in closed loop is discussed in this paper. Concepts that are useful for a systematic treatment of the problem are introduced. The results refer to the case where the regulator is a linear feedback law or alternates between several such laws. It is shown that a straightforwardly applied identification scheme has the same identifiability properties as the more complex method in which the parameters of the closed-loop system are estimated first. It is also shown that it is always possible to achieve the same identifiability properties as for open-loop systems by shifting between different linear regulators. The required number of regulators depends only on the number of inputs and outputs. The results obtained are illustrated by a numerical example. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/42e650bd-5eda-4182-87c7-720fbd089b24
- author
- Ljung, Lennart ; Gustavsson, Ivar and Söderström, Torsten
- organization
- publishing date
- 1974
- type
- Contribution to journal
- publication status
- published
- subject
- in
- IEEE Transactions on Automatic Control
- volume
- 19
- issue
- 6
- pages
- 836 - 840
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:0016319653
- ISSN
- 0018-9286
- DOI
- 10.1109/TAC.1974.1100702
- language
- English
- LU publication?
- no
- id
- 42e650bd-5eda-4182-87c7-720fbd089b24
- date added to LUP
- 2018-12-27 11:23:20
- date last changed
- 2021-09-26 03:56:28
@article{42e650bd-5eda-4182-87c7-720fbd089b24, abstract = {{The possibility of estimating process parameters using input-output data collected when the system operates in closed loop is discussed in this paper. Concepts that are useful for a systematic treatment of the problem are introduced. The results refer to the case where the regulator is a linear feedback law or alternates between several such laws. It is shown that a straightforwardly applied identification scheme has the same identifiability properties as the more complex method in which the parameters of the closed-loop system are estimated first. It is also shown that it is always possible to achieve the same identifiability properties as for open-loop systems by shifting between different linear regulators. The required number of regulators depends only on the number of inputs and outputs. The results obtained are illustrated by a numerical example.}}, author = {{Ljung, Lennart and Gustavsson, Ivar and Söderström, Torsten}}, issn = {{0018-9286}}, language = {{eng}}, number = {{6}}, pages = {{836--840}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Automatic Control}}, title = {{Identification of linear, multivariable systems operating under linear feedback control}}, url = {{http://dx.doi.org/10.1109/TAC.1974.1100702}}, doi = {{10.1109/TAC.1974.1100702}}, volume = {{19}}, year = {{1974}}, }