Method for monitoring electromechanical, pneumatic or hydraulic actuators, and implementing device
AssigneeLa Poste (Exploitant Public)
InventorsDidier Thieriot, Pierre Darchis
Life of this patent
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Abstract
A method for monitoring a plurality of identical actuators of a common operational assembly having the following steps: operating actuators one by one in similar powering conditions; measuring the energy agent flux during the excitation cycle of each; elaborating for each a time-based curve of the measure flux; elaborating a superposition from curves, and deducing therefrom a normality tracing; isolating the curves showing variations with respect to the normality tracing; and establishing a trouble shooting for each isolated curve, based on variations.
Claims9
Diagnostic and monitoring method relating to a plurality of identical actuators (E), characterized in that it includes the following stages:
- successively and separately feeding each of said plurality of identical actuators (E), from a given electric, pneumatic or hydraulic energy source (S), and in similar circuit conditions;
- measuring at a feed outlet of the energy source (S) the energy agent flow during the cycle for exciting each actuator (E);
- establishing for each actuator a reading or flow curve (c) measured according to the time;
- establishing a superposition from the set of all said curves (c), the superposition (T) obtained defining a track (T′) occupied by the largest number of said curves (c) and considered in this respect as a normality track;
- isolating the curves having deviations relating to said track (T′);
- and
- establishing an anomaly diagnostic of each isolated curve on the basis of the deviation(s) it has with said track (T′).
Dependencies are inferred from the claim text.