Centre National De La Recherche Scientifique

Safran Electronics & Defense

Romain Breuneval

Badr Mansouri

Guy Clerc

Julien Huillery

Emmanuel Boutleux

Ryan Michaud

Babak Nahid-mobarakeh

A method for estimating a Remaining Useful Life of a subject equipment, with a preliminary phase including the following steps: acquire test observations (step) and produce test time series (S) of at least one signature; partition the test time series to obtain severity classes corresponding to the ageing phases of the test equipment devices (step); carry out an initial learning of a diagnosis model on the test equipment devices (step); perform a second learning of a signature prediction model (step). There is also an operational phase including the following steps: acquire observations when in operation on the subject equipment and produce an extrapolated time series using the prediction model; classify the extrapolated time series using the diagnosis model and derive the remaining useful life of the subject equipment.

Method for estimating the remaining service life of subject equipment

A monitoring method for monitoring equipment of electromechanical actuator type, the equipment including a three-phase electric motor, the monitoring method comprising the following steps: measuring three-phase currents powering the three-phase electric motor; projecting the three-phase currents into a Park reference frame; performing an ensemblist empirical mode decomposition processor the quadrature current coupled with a blind source separation process in order to obtain source components; from among the source components, automatically selecting a first set of source components sensitive to a first defect, and a second set of source components sensitive to a second defect; constructing a first virtual defect signal and a second virtual defect signal; and extracting a first set of signatures representative of the first defect from the first virtual defect signal, and extracting a second set of signatures representative of the second defect from the second virtual defect signal.

Method for monitoring an electromagnetic actuator type apparatus

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Boulogne Billancourt, France

Romain Breuneval