Diagnosis Analysis of Modelica Models
To leverage on model based engineering for fault diagnosis, it is
useful to be able to do direct analysis of general purpose modelling
languages for engineering systems. In this work, it is demonstrated
how non-trivial Modelica models, for example utilizing the Modelica
standard library, can be automatically transformed into a format where
existing fault diagnosis analysis techniques are applicable. The
procedure is demonstrated on a model of an air cooling system in the
Gripen fighter aircraft developed by Saab, Sweden. It is discussed why
the Modelica language is well suited for diagnosability analysis, and
a number of non-trivial diagnosability analysis shows the efficacy of
the approach. The methods extract the model structure, which gives
additional insight into the system, e.g., highlighting model
connections and possible model decompositions.
Mattias Krysander, Frisk, Erik, Ingela Lind and Ylva Nilsson
2018
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