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In the design of a residual generator for an unstable plant, the unstable modes are made unobservable from the residual vector. We point out that this cannot be achieved in practice due to the discrepancy between the estimated model and the “true” plant model. Hence, we deduce that it is not possible to design a residual generator for an unstable plant, unless it is stabilized by an adequate controller. As a by-product, we provide expressions which can be used to quantify the effect of modeling uncertainties on the performance of a residual generator. The factorization approach to control theory is used for the developments
Published in:
Automatic Control, IEEE Transactions on
(Volume:40
,
Issue:
4
)
Date of Publication: Apr 1995
- Page(s):
- 740 - 742
- ISSN :
- 0018-9286
- INSPEC Accession Number:
- 4930821
- Digital Object Identifier :
- 10.1109/9.376097
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Apr 1995
- Sponsored by :
- IEEE Control Systems Society
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