METHOD FOR MONITORING THE TECHNICAL CONDITION OF A LIQUID ROCKET ENGINE IN TRANSITIONAL MODES OF A BENCH TEST Russian patent published in 2021 - IPC G01M15/14 G06F17/18 F02K9/96 

FIELD: space industry.

SUBSTANCE: invention can be used for analysing the operation of a wide class of technical systems, in particular, in rocket and space equipment for monitoring the state of a liquid rocket engine (LRE) in transitional modes of firing bench tests. To make decisions about the occurrence of a malfunction, the termination of the test and the determination of a malfunctioning aggregate in transitional modes of a bench test, time series of change gradient values in the measured parameters, exhibiting a property of stationarity attributed to the fact that during the bench tests conducted according to a preset cyclogram, in transitional modes, the engine is controlled by linearly changing the drive angle of the control aggregate, are subjected to statistical evaluation according to the Student criterion. If the current values of the statistical characteristics exceed the threshold values thereof, the fact and the moment of the occurrence of a malfunction are recorded and the LRE testing is stopped to prevent the development of the detected malfunction, wherein the malfunctioning LRE is determined based on the measured parameter, the statistical characteristics whereof first exceeded the threshold values, and is subsequently replaced with a functional one.

EFFECT: in transitional modes of fire bench tests of an LRE, identification and compensation of the influence of developing malfunctions on the engine become possible, ultimately ensuring deactivation of the engine before occurrence of irreversible changes and prevention of catastrophic consequences.

1 cl, 2 dwg