METHOD FOR SPECTRAL ASSESSMENT OF THE OCCURRENCE OF THE PRE-SURGE CONDITION OF AIRCRAFT GAS TURBINE ENGINES Russian patent published in 2022 - IPC F04D27/02 

FIELD: aviation technology.

SUBSTANCE: invention relates to aviation technology, in particular to the diagnosis of the state of gas turbine engines (GTE) of aircraft, namely to the diagnosis of the pre-surge condition and can be used for the purpose of promptly identifying pre-surge modes of operation of the GTE for the timely use of existing anti-surge systems of the aircraft, which, when switched on in a timely manner, exclude the failure or destruction of the aircraft GTE. A method for diagnosing the pre-surge condition state of gas turbine engines of an aircraft, in which acoustic signals are received from at least one vibroacoustic sensor installed in the compressor zone of the aircraft GTE on power elements, the amplitudes of the sensor signals are recorded, the obtained amplitudes of the acoustic signal are divided into time samples, for which the spectral density is determined using the Fourier transform, then the numerical characteristics of the spectral density of samples are compared with each other using the Kolmogorov consensus criterion statistics value and the obtained Kolmogorov criterion statistics values are compared with a given threshold value and if the condition S_k > 0.5 is met for at least one sensor, where S_k is the Kolmogorov criterion statistics value, a decision is made on the occurrence of a pre-surge operation mode of the gas turbine engine and a signal is sent to use the anti-surge protective equipment.

EFFECT: invention provides an operational determination of the beginning of the development of pre-surge processes of the GTE of the aircraft, which provides an increase in the time for the use of anti-surge protective equipment due to early detection of the pre-surge mode of operation and a decrease in the time of unstable operation of the GTE of the aircraft.

1 cl, 2 dwg