Residual Bond Graph Sinks for Numerical Evaluation of Analytical Redundancy Relations in Model Based Single Fault Detection and Isolation

Abstract — The paper proposes a bond graph approach to model based fault detection and isolation (FDI) that uses residual sinks. These elements couple a reference model of a process engineering system to a bond graph model of the system that is subject to disturbances caused by faults. In this paper it is assumed that two faults do not appear si-multaneously. The underlying mathematical model is a Differential Al-gebraic Equations (DAE) system. The approach is illustrated by means of the often used hydraulic two tanks system