Patent ID: 11867128
Assignee: SAFRAN AIRCRAFT ENGINES
Field: Measurement (Instruments)
Classification: CPC F  G  H | IPC F  H

Claim 0:
1. A method for filtering an input signal, the method implementing, in a computer of a control system of a turbine engine, frequency filtering of the input signal, the input signal measuring a physical quantity of the turbine engine, the input signal being digitized, the input signal being supplied at the input of the computer, a numerical time derivative of the input signal being intended to be used by the control system,
the method comprising the following steps:
detecting, in the input signal, a variation of amplitude of the physical quantity, by a step of generating a second time derivative signal of the input signal and a step of comparing a value of the second time derivative signal with a predetermined threshold,
adjusting the frequency filtering of the input signal depending on the detected variation of amplitude of the physical quantity, by a step of controlling a controlled filter capable of applying frequency filtering of the low-pass type to the input signal, so that the controlled filter applies the frequency filtering if the value of the second time derivative signal of the input signal is inferior to the predetermined threshold.