Abstract: A system for monitoring a filter used for filtering a fluid in an aircraft engine. The system includes a pressure sensor acquiring over time a differential pressure of the fluid through the filter; a computer for computing a normalized differential pressure under reference conditions by normalizing the measured differential pressure according to conditions for exploiting the fluid; a memory for storing a predetermined reference clogging curve describing a time-dependent change of the normalized differential pressure depending on a pollutant mass injected into the filter. The computer can estimate the pollutant mass injected into the filter by projecting a current value of the normalized differential pressure onto the reference clogging curve; and can generate from the estimated pollutant mass a set of signatures defining the condition and the time-dependent change of clogging of the filter.

Abstract: The invention relates to a system for monitoring a filter (3) used for filtering a fluid (5) in an aircraft engine (7), including: pressure measurement means (27) for acquiring over time a differential pressure of the fluid (5) through the filter (3); computing means (11) for computing a normalized differential pressure under reference conditions by normalizing the measured differential pressure according to conditions for exploiting the fluid (5); storage means (13) for storing in memory a predetermined reference clogging curve (Cr) describing a time-dependent change of the normalized differential pressure depending on a pollutant mass injected into the filter (3); computing means (11) for estimating the pollutant mass injected into the filter (3) by projecting a current value of said normalized differential pressure onto said reference clogging curve (Cr); and computing means (11) for generating from said estimated pollutant mass a set of signatures defining the condition and the time-dependent change of