The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2022
Filed:
Oct. 29, 2019
Safran Aircraft Engines, Paris, FR;
Ruben Abraham Elbaz, Moissy-Cramayel, FR;
Lancelot Guillou, Moissy-Cramayel, FR;
Nicolas Andrea Fabbro, Moissy-Cramayel, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
The invention relates to a device for monitoring the lifetime of at least one hydraulic apparatus of an aircraft that is subject to ventilations in hydraulic pressure during flight, comprising an interface for receiving measurement data which are representative of hydraulic pressure (P). The invention is characterised in that the device comprises a processing device, comprising a means for detecting a pressure (P) load (SOLL) of a damaging nature, which load is defined by the fact that the pressure (P) comprises a pressure increase (ΔP) that is greater than a predetermined damage threshold (S), followed by a pressure decrease (ΔP) that is greater than the threshold (S), a means for calculating a pressure variation magnitude that is equal to the maximum increase (ΔP) and the maximum decrease (ΔP), a means for projecting the magnitude onto a decreasing curve or straight line of a damage model in order to determine the permissible number of loads corresponding to the magnitude, a means for calculating a potential damage ratio that is equal to a number of reference loads divided by the permissible number, a means for increasing a count of accumulated ratios by said ratio.