A Universal Chow-Willsky Scheme and Detectability Criteria
An important issue in diagnosis research is design methods for
residual generation. One method is the Chow-Willsky scheme, which is here
extended such as it becomes \emph{universal} in
the sense that, for both discrete and continuous linear systems, it is
shown to be able to generate all possible parity functions. It is
shown that previous extensions to the Chow-Willsky scheme are not
universal, which happens when there are dynamics controllable from
faults but not from the inputs or disturbances. Also included are two
new conditions on the process for fault detectability and strong fault
detectability.
Mattias Nyberg and Lars Nielsen
IEEE Transactions Automatic Control,
2000
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