Method and apparatus for vehicle component health prognosis by integrating aging model, usage information and health signatures
First Claim
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1. A method for determining the health of a component, the method comprising:
- retrieving measured health signatures from the component;
retrieving component usage variables;
estimating component health signatures using an aging model and the component usage variables;
determining an aging derivative using the aging model;
calculating an aging error based on the estimated component health signatures, the aging derivative and the measured health signatures; and
recalculating the estimated component health signatures and the aging derivative until the aging error is below a predetermined threshold.
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Abstract
A system and method for determining the health of a component includes retrieving measured health signatures from the component, retrieving component usage variables, estimating component health signatures using an aging model, determining an aging derivative using the aging model and calculating an aging error based on the estimated component health signatures, the aging derivative and the measured health signatures.
5 Citations
19 Claims
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1. A method for determining the health of a component, the method comprising:
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retrieving measured health signatures from the component; retrieving component usage variables; estimating component health signatures using an aging model and the component usage variables; determining an aging derivative using the aging model; calculating an aging error based on the estimated component health signatures, the aging derivative and the measured health signatures; and recalculating the estimated component health signatures and the aging derivative until the aging error is below a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for determining the health of a component, the system comprising:
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a computing device with a memory that includes; an aging model configured to calculate estimated component health signatures based on a plurality of component usage variables; a comparison module configured to calculate an aging error based on the estimated component health signatures and measured component health signatures; and a calculation block configured to calculate an estimated age of the component based on the aging error, and to determine the remaining life of the component based on a maximum life expectancy and the estimated age of the component. - View Dependent Claims (8, 9)
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10. A system that includes a non-transitory computer-readable medium tangibly embodying computer-executable instructions for:
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initializing an age estimation; retrieving measured health signatures from the component; retrieving component usage variables; estimating component health signatures using the age estimation and the component usage variables; determining an aging derivative using the partial derivative of the estimated health signature with respect to the age estimation; and calculating an aging error based on the estimated component health signatures, the aging derivative and the measured health signatures. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification