Sensor placement for component diagnosability using bond-graph

The FDI fault detection and isolation procedure consists of the comparison of the actual behaviour with the reference behaviour which describes the normal mode. The analytical redundancy has to find relations between known variables of the system. These relations are satisfied in the normal mode and not satisfied in presence of a failure. A (0–1) table where these relations are reported on rows and the signature fault of the variable to be monitored on columns, is said the signature failures table. This paper deals with combinatorial aspect of detectors placement on bond-graph junction nodes. A new method is proposed to avoid the exploration of all the combinations using causal path properties. This is shown through an example.