A Mixed Causality Approach to Residual Generation Utilizing Equation System Solvers and Differential-Algebraic Equation Theory
The FDI approach to model-based diagnosis is considered.
We present a method for residual generation
that combines integral and derivative causality,
and also utilizes equation system solvers and
theory of differential-algebraic equation systems.
To achieve this, a framework for computation of
variables from sets of dependent differential and/or
algebraic equations is introduced. The proposed
method is applied to a model of the gas flow in an
automotive diesel engine. The application clearly
shows the benefit of using a mixed causality approach
for residual generation compared with solely
integral or derivative causality.
Carl Svärd and Mattias Nyberg
19th International Workshop on Principles of Diagnosis (DX-08),
2008
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