Residual Sinks in Bond Graph based Numerical Fault Detection

W. Borutzky (Germany)


Bond Graphs, model based fault detection, analytical re dundancy relations, residual bond graph sinks, DAE sys tems, off-line simulation, study of fault scenarios.


This paper shows how residual sinks can be used for bond graph model based fault detection. These elements cou ple a reference model of a process engineering system to a bond graph model of the faulty system and enable to use integral causality as the preferred computational causality in both models. It is assumed that two faults do not occur simultaneously. The underlying mathematical model is a Differential Algebraic Equations (DAE) system. The ap proach is illustrated by means of the often used example of a hydraulic two tank system.

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