METHOD OF CONTROLLING PARAMETRIC FAIL-SAFETY OF ARTICLES BY STATE PARAMETERS Russian patent published in 2021 - IPC G01D21/00 

FIELD: astronautics.

SUBSTANCE: invention relates to methods of control tests of rocket-and-space equipment on failure-free operation, in particular, to calculation and experimental methods of evaluation and control of article fail-safety at stable parameters of state during performance of identification tests. Method of controlling parametric failure-free operation of articles based on state parameters comprises determining the form of the function of distributing time to failure or failure of the article, detecting information state parameters, which largely affect the product reliability, establishing tolerable limits of state parameters, which characterize normal operation of the article, one (test) sample is tested under normal operating conditions for the specified time of the target task t_I= TT, measuring and recording values of informative parameters of state X_i, which are practically uncorrelated, at equal intervals of time, assuming a normal distribution of state parameters, calculating values of point estimates (PE) of state parameters and their root-mean-square deviations (MSD), error determination of PE and MSD is determined, density of probability of distribution of state parameters with distribution parameters is constructed, point value of parametric failure-free operation of article is calculated, MSD of obtained value of parametric fail-safety is determined, calculating lower confidence boundary of parametric fail-safety at given reliability γ, obtained point and interval values of parametric fail-safety are compared with required ones and decision is made on article fail-safety.

EFFECT: technical result consists in possibility of control of parametric failure-free operation of any complex systems, providing a possibility to make a positive decision on compliance with failure indicators to requirements, even in the presence of parametric failures, as well as improvement of reliability of its control and reduction of volume and time of testing products.

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