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ARX modeling of unstable linear systems
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- Galrinho, Miguel (author)
- KTH,Reglerteknik,ACCESS Linnaeus Centre
-
- Everitt, Niklas (author)
- KTH,Reglerteknik,ACCESS Linnaeus Centre
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- Hjalmarsson, Håkan (author)
- KTH,Reglerteknik,ACCESS Linnaeus Centre
- (creator_code:org_t)
- Elsevier, 2017
- 2017
- English.
- In: Automatica. - : Elsevier. - 0005-1098. ; 75, s. 167-171
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- High-order ARX models can be used to approximate a quite general class of linear systems in a parametric model structure, and well-established methods can then be used to retrieve the true plant and noise models from the ARX polynomials. However, this commonly used approach is only valid when the plant is stable or if the unstable poles are shared with the true noise model. In this contribution, we generalize this approach to allow the unstable poles not to be shared, by introducing modifications to correctly retrieve the noise model and noise variance.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)
Keyword
- System identification
- Polynomial models
- Closed-loop identification
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- ref (subject category)
- art (subject category)
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- Royal Institute of Technology
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