Fault diagnosis device and method for optimizing maintenance measures in technical systems
First Claim
1. A fault diagnosis device for optimizing maintenance measures in a flying object comprising:
- a storage unit for storing diagnosis rules, which each have a fault condition indicating the presence of a fault, and a fault conclusion formed by logical combinations of potential fault causes of the respective fault;
a logic unit, which logically combines those stored fault conclusions whose associated fault conditions are met and automatically determines a logical diagnosis result having at least one fault cause hypothesis by logical Boolean calculation specifications on the basis of the combined fault conclusions of the diagnosis rules; and
comprising a calculation unit, which calculates an occurrence probability for each fault cause hypothesis of the logical diagnosis result based on failure probabilities of individual components stored in a table, wherein the calculation unit transmits the calculated occurrence probabilities of the fault cause hypotheses of the logical diagnosis result to a maintenance device which is arranged on the ground via a wireless interface.
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Abstract
The present invention provides a fault diagnosis device for optimizing maintenance measures in a system, in particular a flying object. The diagnosis device has a storage unit for storing diagnosis rules, which each have a fault condition indicating the presence of a fault, and a fault conclusion formed by logical combinations of potential fault causes of the respective fault. Furthermore, a logic unit is provided, which logically combines those stored fault conclusions whose associated fault conditions are met and, on the basis of the combined fault conclusions, determines a logical diagnosis result having at least one fault cause hypothesis. A calculation unit subsequently calculates an occurrence probability for each fault cause hypothesis of the logical diagnosis result determined.
25 Citations
18 Claims
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1. A fault diagnosis device for optimizing maintenance measures in a flying object comprising:
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a storage unit for storing diagnosis rules, which each have a fault condition indicating the presence of a fault, and a fault conclusion formed by logical combinations of potential fault causes of the respective fault; a logic unit, which logically combines those stored fault conclusions whose associated fault conditions are met and automatically determines a logical diagnosis result having at least one fault cause hypothesis by logical Boolean calculation specifications on the basis of the combined fault conclusions of the diagnosis rules; and comprising a calculation unit, which calculates an occurrence probability for each fault cause hypothesis of the logical diagnosis result based on failure probabilities of individual components stored in a table, wherein the calculation unit transmits the calculated occurrence probabilities of the fault cause hypotheses of the logical diagnosis result to a maintenance device which is arranged on the ground via a wireless interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17, 18)
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12. A method for optimizing maintenance measures in an object of an aircraft or spacecraft comprising the following steps:
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providing diagnosis rules from a storage unit to a logic unit, wherein each of the diagnosis rules have a fault condition indicating the presence of a fault, and a fault conclusion comprising a logical combination of potential fault causes of the fault; receiving information at the logic unit from one or more fault detectors about whether fault conditions are met or whether a fault event has occurred; in the logic unit, logically combining those fault conclusions whose associated fault condition is met according to the information received from the fault detectors in order to automatically determine a logical diagnosis result having at least one fault cause hypothesis by logical Boolean calculation specifications on the basis of the combined fault conclusions of the diagnosis rules; calculating an occurrence probability for each fault cause hypothesis of the logical diagnosis result determined based on failure probabilities of individual components stored in a table; and transmitting, the calculated occurrence probabilities of the fault cause hypotheses of the logical diagnosis result to a maintenance device which is arranged on the ground via a wireless interface. - View Dependent Claims (13, 14, 15)
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16. A computer program embodied in a non-transitory computer readable medium, the computer program being configured for carrying out a method comprising:
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providing diagnosis rules from a storage unit to a logic unit, wherein each of the diagnosis rules have a fault condition indicating the presence of a fault, and a fault conclusion comprising a logical combination of potential fault causes of the fault; receiving information at the logic unit from one or more fault detectors about whether fault conditions are met or whether a fault event has occurred; in the logic unit, logically combining those fault conclusions whose associated fault condition is met according to the information received from the fault detectors in order to automatically determine a logical diagnosis result having at least one fault cause hypothesis by logical Boolean calculation specifications on the basis of the combined fault conclusions of the diagnosis rules; calculating an occurrence probability for each fault cause hypothesis of the logical diagnosis result determined based on failure probabilities of individual components stored in a table; and transmitting the calculated occurrence probabilities of the fault cause hypotheses of the logical diagnosis result to a maintenance device which is arranged on the ground via a wireless interface.
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Specification