Abstract: A method and a device for filtering diagnostic messages obtained from a plurality of elements of a system, each of these elements comprising diagnostic means capable of detecting a failure and of transmitting a message comprising at least one failure indication. The state of at least certain elements of the said plurality of elements is represented by a model of state. After at least one failure message has been received, this message is filtered according to the failure indication that it contains and according to the model of state. In response to the filtering step, the model of state is updated according to the failure indication or the message is rejected. The filtering step is advantageously based on a propositional logic mechanism.

Abstract: The invention relates to a process for determining a diagnostic for a breakdown of an avionic system, the avionic system comprising a plurality of functional units and surveillance units, each capable of performing surveillance of at least one functional unit, characterized in that it comprises the following steps: acquisition of diagnostics from at least one surveillance unit, a diagnostic emitted by one surveillance unit relating to the said at least one functional unit subjected to surveillance by the surveillance unit, construction of possible diagnostics on the basis of the acquired diagnostics, determination of a likelihood criterion for each constructed possible diagnostic, the likelihood criterion for a possible diagnostic being determined on the basis of a unitary criterion determined for each functional unit associated with the possible diagnostic, selection of the possible diagnostic among the possible diagnostics according to the likelihood criterion.

Abstract: The object of the invention is a method and a device for filtering diagnostic messages obtained from a plurality of elements of a system, each of these elements comprising diagnostic means capable of detecting a failure and of transmitting a message comprising at least one failure indication. The state of at least certain elements of the said plurality of elements is represented by a model of state. After at least one failure message has been received, this message is filtered according to the failure indication that it contains and according to the model of state. In response to the filtering step, the model of state is updated according to the failure indication or the message is rejected. The filtering step is advantageously based on a propositional logic mechanism.

Abstract: The invention relates to a process for determining a diagnostic for a breakdown of an avionic system, the avionic system comprising a plurality of functional units and surveillance units, each capable of performing surveillance of at least one functional unit, characterized in that it comprises the following steps: acquisition of diagnostics from at least one surveillance unit, a diagnostic emitted by one surveillance unit relating to the said at least one functional unit subjected to surveillance by the surveillance unit, construction of possible diagnostics on the basis of the acquired diagnostics, determination of a likelihood criterion for each constructed possible diagnostic, the likelihood criterion for a possible diagnostic being determined on the basis of a unitary criterion determined for each functional unit associated with the possible diagnostic, selection of the possible diagnostic among the possible diagnostics according to the likelihood criterion.