Data processing: structural design – modeling – simulation – and em – Modeling by mathematical expression
Reexamination Certificate
2007-11-20
2007-11-20
Ferris, Fred (Department: 2128)
Data processing: structural design, modeling, simulation, and em
Modeling by mathematical expression
C703S006000, C703S013000, C700S021000, C702S034000
Reexamination Certificate
active
10017014
ABSTRACT:
A method for providing a virtual age estimation for predicting the remaining lifetime of a device of a given type, comprises the steps of monitoring a predetermined number of significant parameters of respective ones of a training set of devices of the given type, the parameters contributing respective wear increments, determining coefficients of a multivariate Hermite polynomial for modeling the wear increments determined from the training set operated to failure and whereof the respective virtual ages are normalized substantially to a desired norm value, deriving from the multivariate Hermite polynomial a formula for virtual age of a device of the given type, and applying the formula to the significant parameters from a further device of the given type for deriving wear increments for the further device.
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Reliability Engineering by Arinc Research Corporation, Prentice Hall 1965, pp. 136-183.
Darken Christian
Loecher Markus
Conover Michele L.
Ferris Fred
Siemens Corporate Research Inc.
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