APPARATUS AND A METHOD FOR DETERMINING A MAINTENANCE PLAN
First Claim
1. An apparatus for determining a maintenance plan, comprising:
- a maintenance action and cost database to store a plurality of maintenance actions executable for a system and a plurality of maintenance costs each differently corresponding to each of the plurality of maintenance actions;
a reference strategy database to store a reference strategy determining a maintenance action to be executed for the system, based on a degradation or an output of the system;
a fault model database to store a fault model stochastically representing an occurrence of the degradation;
a simulation unit configured, if the system is respectively maintained by each maintenance action at a first timing, if the system is degraded by the fault model from the first timing to a predetermined timing, and if the system is maintained by the reference strategy from a second timing after passing a predetermined period from the first timing to the predetermined timing, to set at least one search timing in a search period from the first timing to the second timing, and to calculate a maintenance action value of each maintenance action at the search timing, based on the output and a maintenance cost corresponding to the maintenance action by which the system is maintained from the first timing to the predetermined timing; and
a maintenance plan search unit configured to select an optimum maintenance action from the plurality of maintenance actions, based on the maintenance action value of each maintenance action.
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Accused Products
Abstract
Maintenance actions, maintenance costs each differently corresponding to each maintenance action, a reference strategy and a fault model, are stored. If a system is maintained by each maintenance action at a first timing, if the system is degraded by the fault model from the first timing to a predetermined timing, and if the system is maintained by the reference strategy from a second timing after passing a predetermined period from the first timing to the predetermined timing, at least one search timing is set into a search period from the first timing to the second timing. A maintenance action value of each maintenance action is calculated at the search timing, based on an output and the maintenance cost of the system maintained from the first timing to the predetermined timing. An optimum maintenance action is selected from the maintenance actions, based on the maintenance action value of each maintenance action.
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Citations
12 Claims
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1. An apparatus for determining a maintenance plan, comprising:
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a maintenance action and cost database to store a plurality of maintenance actions executable for a system and a plurality of maintenance costs each differently corresponding to each of the plurality of maintenance actions; a reference strategy database to store a reference strategy determining a maintenance action to be executed for the system, based on a degradation or an output of the system; a fault model database to store a fault model stochastically representing an occurrence of the degradation; a simulation unit configured, if the system is respectively maintained by each maintenance action at a first timing, if the system is degraded by the fault model from the first timing to a predetermined timing, and if the system is maintained by the reference strategy from a second timing after passing a predetermined period from the first timing to the predetermined timing, to set at least one search timing in a search period from the first timing to the second timing, and to calculate a maintenance action value of each maintenance action at the search timing, based on the output and a maintenance cost corresponding to the maintenance action by which the system is maintained from the first timing to the predetermined timing; and a maintenance plan search unit configured to select an optimum maintenance action from the plurality of maintenance actions, based on the maintenance action value of each maintenance action. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for determining a maintenance plan, comprising:
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reading a maintenance action and cost database that stores a plurality of maintenance actions executable for a system and a plurality of maintenance costs each differently corresponding to each of the maintenance actions; reading a reference strategy database that stores a reference strategy determining a maintenance action to be executed for the system, based on a degradation or an output of the system; reading a fault model database that stores a fault model stochastically representing an occurrence of the degradation; if the system is respectively maintained by each maintenance action at a first timing, if the system is degraded by the fault model from the first timing to a predetermined timing, and if the system is maintained by the reference strategy from a second timing after passing a predetermined period from the first timing to the predetermined timing, setting at least one search timing in a search period from the first timing to the second timing; calculating a maintenance action value of each maintenance action at the search timing, based on the output and a maintenance cost corresponding to the maintenance action by which the system is maintained from the first timing to the predetermined timing; and selecting an optimum maintenance action from the plurality of maintenance actions, based on the maintenance action value of each maintenance action.
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Specification