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Nonlinear decoupling approach to fault isolation in linear systems

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3 Author(s)
Garcia, E.A. ; Dept. of Meas. & Control., Gerhard-Mercator Univ. of Duisburg, Germany ; Seliger, R. ; Frank, P.M.

The problem of fault isolation in linear systems is considered. Based on a novel fault representation (multiplicative-like) and on a nonlinear decoupling transformation similar to one used for nonlinear systems, it is shown how the fault isolability can be improved. A further advantage of this approach is that it allows the application of observer-based methods to multiplicative fault representations. The price to be paid is the requirement of a nonlinear decoupling transformation as well as a nonlinear residual generation. Existence conditions as well as a design procedure are provided. An example is used to show the application of the above ideas

Published in:

American Control Conference, 1998. Proceedings of the 1998  (Volume:5 )

Date of Conference:

21-26 Jun 1998