Abstract: Aided preventive diagnostics of an aircraft system, comprising a plurality of subsystems at least one of which comprises a subsystem configured for monitoring and notifying a detected event, using critical event charts. After receiving a message notifying the occurrence of said detected event, a minimal diagnostic set relative to said at least one detected event, comprising a plurality of elements each represented by a node of said critical event chart is created, each element of said minimal diagnostic set being determined according to at least one logical implication relation of said critical event chart with a node representing said at least one received notification message. At least some of the elements of said minimal diagnostic set are then ranked, said ranked elements forming part of said diagnostic report.

Abstract: Aided analysis of the failure tolerance of an aircraft system, comprising a plurality of subsystems at least one of which comprises a monitoring unit and notification of a detected event, using critical event charts. After selecting at least one receivable notification message represented by a node of the critical event chart, elements of the minimal diagnostic set capable of resulting in the generation of the at least one selected notification message are identified, the identified elements forming part of the failure tolerance report.

Abstract: A diagnostic system of an aircraft, comprising a plurality of sub-systems at least one of which performs monitoring and notification of at least one detected event, using graphs of feared events. After a message of notification of occurrence of the detected event has been received, a set of feared events linked to this message is created from the graph of feared events, and logic expressions are constructed according to logic links represented in the graph of feared events. A group of feared events then is created according to elements of the logic expressions. The minimal vertexes of the logic expressions associated with the feared events of the group are calculated and form a diagnosis of the system.

Abstract: Aided analysis of the failure tolerance of an aircraft system, comprising a plurality of subsystems at least one of which comprises a monitoring unit and notification of a detected event, using critical event charts. After selecting at least one receivable notification message represented by a node of the critical event chart, elements of the minimal diagnostic set capable of resulting in the generation of the at least one selected notification message are identified, the identified elements forming part of the failure tolerance report.

Abstract: Aided preventive diagnostics of an aircraft system, comprising a plurality of subsystems at least one of which comprises a subsystem configured for monitoring and notifying a detected event, using critical event charts. After receiving a message notifying the occurrence of said detected event, a minimal diagnostic set relative to said at least one detected event, comprising a plurality of elements each represented by a node of said critical event chart is created, each element of said minimal diagnostic set being determined according to at least one logical implication relation of said critical event chart with a node representing said at least one received notification message. At least some of the elements of said minimal diagnostic set are then ranked, said ranked elements forming part of said diagnostic report.

Abstract: The invention in particular has as an object aid in diagnosis of a system of an aircraft, comprising a plurality of sub-systems at least one of which comprises means for monitoring and notification of at least one detected event, using graphs of feared events. After a message of notification of occurrence of the said detected event has been received (500), a set of feared events linked to this message is created (510) from the said graph of feared events, and logic expressions—using as operands elements of the system coherent with the feared events of the said set—are constructed (515) according to the logic links represented in the said graph of feared events. A group of feared events then is created (520) according to elements of the said logic expressions. The minimal vertexes of the logic expressions associated with the feared events of the said group are calculated and form a diagnosis of the said system.

Abstract: A method for automatic fault detection with data representing a fault in an on-board system, the method including: determining, with a processor, at least two physical variables represented by said data, said at least two physical variables including at least one time-dependent variable representative of a persistence of an event in time, and at least one instantaneous variable; representing, with the processor, said data by points of a space whose coordinates are values of said at least two physical variables; an detecting, with the processor, a fault by employing a frontier defining a subspace of said space in which representation of a datum is associated with the detection of a fault.

Abstract: The method includes: a step (505) of determining at least two physical variables represented by the said data, the said physical variables including at least: one time-dependent variable representative of the persistence of an event in time and at least one instantaneous variable; a step (530) of representing the said data by points of a space whose coordinates are the values of the said physical variables and a step (535) of employing a frontier defining a subspace of the said space in which the representation of a datum is associated with the detection of a fault. In some embodiments, there is performed a step (540) of estimating the reactivity of detection of the said fault as a function of the said frontier and of the position of the representation of the first datum associated with a fault in the said subspace.