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US 2019/0155972 A1Published application
Method for predicting the behaviour of a product with respect to failures thereof
AssigneeSchneider Electric Industries SAS
InventorsMarcel CHEVALIER, Veronique BOUTIN, Michel CERCUEIL
Life of this patent
Estimating the term…
Abstract
A method for predicting the probability of technical faults in a product composed of multiple separate parts, each having its own specific life cycle and degradation kinetics, by analysing the contribution of each mode of degradation of each part to each observed fault mode of the product.
Claims9
A method for predicting the behaviour of a product,
- composed of multiple separate parts, each having its own specific life cycle and degradation kinetics, with respect to potential failures thereof, comprising:
- cataloguing the various possible failure modes of the product,
- determining the possible degradation modes for each part of the product under the conditions of use that are liable to contribute to each catalogued failure mode of said product,
- determining the kinetics of degradation of each part of the product, as a function of the conditions of usage and environmental conditions for each degradation mode of each sub-assembly,
- identifying the possible effects of each of the degradation modes determined on the failure modes of the product,
- quantifying, with a calculation unit, the possible effects of each of the degradation modes determined on the failure modes of the product, calculating, with the calculation unit, the rate of occurrence of each catalogued failure mode, for each of the degradation modes determined, and evaluating the evolution law for the rate of occurrence of each catalogued failure mode, for the possible effects identified in previous step and for each of the degradation modes determined,
- estimating, with said calculation unit, the value of the failure rate as a function of the environmental conditions and of the degradation level for each of the failure modes of the product.
4 more elements
A device for evaluating a target lifetime under the environmental conditions and conditions of use of said product on the basis of the kinetics of each degradation mode of each sub-assembly, comprising:
- a first unit intended to catalogue the various possible failure modes of the product,
- a second unit intended to list the possible degradation modes for each part of the product under the conditions of use that are liable to contribute to each catalogued failure mode of said product,
- a third calculation unit intended to quantify the possible effects of each degradation mode determined on the failure modes of the product, to calculate the rate of occurrence of each catalogued failure mode, for each of the degradation modes determined, to estimate the value of the failure rate for each of the failure modes of the product under actual environmental conditions and conditions of use on the basis of measurements, and to deduce the value of the rate of contribution of each degradation mode to each failure mode of the product P as a function of the occurrence rates measured for each of the degradation modes,
- a fourth calculation unit intended to determine the degradation rate as a function of the kinetic degradation law, for each degradation mode of each sub-assembly.
1 more element
Dependencies are inferred from the claim text.