Method and tool for aided aircraft design using a criterion of operational availability
First Claim
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1. A computer-aided method implemented by a computer for designing an aeronautic system forming all or part of an aircraft, the computer-aided method comprising:
- extracting a plurality of different configurations of the system from a database;
estimating by the computer, for each of the plurality of different configurations, a maintenance time cost of said system for a given period of use, the estimating includingcomputing a first component equal to a mean flight time lost by the aircraft subsequent to a system failure during said period of use,computing a second component equal to a mean unscheduled maintenance time subsequent to a system failure during said period of use,computing a third component equal to a scheduled maintenance time for this the system throughout said period of use, andobtaining said time cost as a weighted sum of the first, second, and third components by a first cost factor, a second cost factor, and a third cost factor respectively;
generating by the computer, based on the estimating, a graphical interface representing the maintenance time cost of at least one configuration of the system, the graphical interface representing the first component as a first part of a bar and representing a worst case situation for the first component, which corresponds to a maximum flight time lost subsequent to a system failure preventing the aircraft from flying, as a second part of the bar, the first part of the bar being distinguished from the second part of the bar; and
selecting the configuration of the system having a lowest maintenance time cost.
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Abstract
A method for the computer-aided design of an aeronautic system forming all or part of an aircraft, using a criterion of maintenance time cost over a given period of use. The cost is computed as the weighted sum of a first component representing the mean flight time lost during this period, a second component representing the mean unscheduled maintenance time for this system during said period, and a third component representing the scheduled maintenance time for this system throughout said period. The configuration corresponding to the lowest time cost is then selected.
18 Citations
10 Claims
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1. A computer-aided method implemented by a computer for designing an aeronautic system forming all or part of an aircraft, the computer-aided method comprising:
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extracting a plurality of different configurations of the system from a database; estimating by the computer, for each of the plurality of different configurations, a maintenance time cost of said system for a given period of use, the estimating including computing a first component equal to a mean flight time lost by the aircraft subsequent to a system failure during said period of use, computing a second component equal to a mean unscheduled maintenance time subsequent to a system failure during said period of use, computing a third component equal to a scheduled maintenance time for this the system throughout said period of use, and obtaining said time cost as a weighted sum of the first, second, and third components by a first cost factor, a second cost factor, and a third cost factor respectively; generating by the computer, based on the estimating, a graphical interface representing the maintenance time cost of at least one configuration of the system, the graphical interface representing the first component as a first part of a bar and representing a worst case situation for the first component, which corresponds to a maximum flight time lost subsequent to a system failure preventing the aircraft from flying, as a second part of the bar, the first part of the bar being distinguished from the second part of the bar; and selecting the configuration of the system having a lowest maintenance time cost. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-transitory computer-readable storage medium including computer executable instructions, wherein the instructions, when executed by a computer, cause the computer to perform a method for designing an aeronautic system forming all or part of an aircraft, the method comprising:
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extracting a plurality of different configurations of the system from a database; estimating, for each of the plurality of different configurations, a maintenance time cost of the system for a given period of use, the estimating including computing a first component equal to a mean flight time lost by the aircraft subsequent to a system failure during the period of use, computing a second component equal to a mean unscheduled maintenance time subsequent to a system failure during the period of use, computing a third component equal to the scheduled maintenance time for the system throughout the period of use, obtaining the time cost as a weighted sum of the first, second, and third components by a first cost factor, a second cost factor, and a third cost factor respectively; generating, based on the estimating, a graphical interface representing the maintenance time cost of at least one configuration of the system, the graphical interface representing the first component as a first part of a bar and representing a worst case situation for the first component, which corresponds to a maximum flight time lost subsequent to a system failure preventing the aircraft from flying, as a second part of the bar, the first part of the bar being distinguished from the second part of the bar; and selecting the configuration of the system having a lowest maintenance time cost.
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Specification