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
2008
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